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Tamura Y, Kumamaru H, Tsujino I, Suda R, Abe K, Inami T, Horimoto K, Adachi S, Yasuda S, Sera F, Taniguchi Y, Kuwana M, Tatsumi K. Switching from Beraprost to Selexipag in the Treatment of Pulmonary Arterial Hypertension: Insights from a Phase IV Study of the Japanese Registry (The EXCEL Study: EXChange from bEraprost to seLexipag Study). Pharmaceuticals (Basel) 2024; 17:555. [PMID: 38794126 PMCID: PMC11124036 DOI: 10.3390/ph17050555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 04/20/2024] [Accepted: 04/22/2024] [Indexed: 05/26/2024] Open
Abstract
Pulmonary arterial hypertension (PAH) remains a significant challenge in cardiology, necessitating advancements in treatment strategies. This study explores the safety and efficacy of transitioning patients from beraprost to selexipag, a novel selective prostacyclin receptor agonist, within a Japanese cohort. Employing a multicenter, open-label, prospective design, 25 PAH patients inadequately managed on beraprost were switched to selexipag. Key inclusion criteria included ongoing beraprost therapy for ≥3 months, a diagnosis of PAH confirmed by mean pulmonary artery pressure (mPAP) ≥ 25 mmHg, and current treatment with endothelin receptor antagonists and/or phosphodiesterase type 5 inhibitors. Outcomes assessed were changes in hemodynamic parameters (mPAP, cardiac index, pulmonary vascular resistance) and the 6 min walk distance (6-MWD) over 3-6 months. The study found no statistically significant changes in these parameters post-switch. However, a subset of patients, defined as responders, demonstrated improvements in all measured hemodynamic parameters, suggesting a potential benefit in carefully selected patients. The transition was generally well-tolerated with no serious adverse events reported. This investigation underscores the importance of personalized treatment strategies in PAH, highlighting that certain patients may benefit from switching to selexipag, particularly those previously on higher doses of beraprost. Further research is needed to elucidate the predictors of positive response to selexipag and optimize treatment regimens for this complex condition.
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Affiliation(s)
- Yuichi Tamura
- Pulmonary Hypertension Center, International University of Health and Welfare Mita Hospital, Tokyo 108-8329, Japan
| | - Hiraku Kumamaru
- Department of Healthcare Quality Assessment, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8654, Japan;
| | - Ichizo Tsujino
- Division of Respiratory and Cardiovascular Innovative Research, Faculty of Medicine, Hokkaido University, Sapporo 060-8638, Japan;
| | - Rika Suda
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan; (R.S.); (K.T.)
| | - Kohtaro Abe
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan;
| | - Takumi Inami
- Department of Cardiovascular Medicine, Kyorin University School of Medicine, Tokyo 160-8582, Japan;
| | - Koshin Horimoto
- Department of Cardiovascular Medicine, Matsuyama Red Cross Hospital, Matsuyama 790-0826, Japan
| | - Shiro Adachi
- Department of Cardiology, Nagoya University Hospital, Nagoya 466-8560, Japan;
| | - Satoshi Yasuda
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai 980-0872, Japan
| | - Fusako Sera
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita 565-0871, Japan
| | - Yu Taniguchi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan;
| | - Masataka Kuwana
- Department of Allergy and Rheumatology, Nippon Medical School Graduate School of Medicine, Tokyo 113-8602, Japan;
- Scleroderma/Myositis Center of Excellence (SMCE), Nippon Medical School Hospital, Tokyo 113-8603, Japan
| | - Koichiro Tatsumi
- Department of Respirology, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan; (R.S.); (K.T.)
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Kitahara K, Omura J, Wada S, Kim SW. Patient and Therapeutic Profiles of Pulmonary Hypertension in Chronic Lung Diseases in Japan: A Cohort Study Using a Claims Database. Pulm Ther 2024; 10:21-49. [PMID: 37950789 PMCID: PMC10881911 DOI: 10.1007/s41030-023-00243-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 10/30/2023] [Indexed: 11/13/2023] Open
Abstract
INTRODUCTION Pulmonary hypertension (PH) is often complicated by chronic lung diseases (CLDs) such as chronic obstructive pulmonary disease (COPD) and interstitial lung disease (ILD). Differentiating between PH associated with CLD (group 3 PH) and pulmonary arterial hypertension (PAH) in CLD is often difficult and reporting on the efficacy of PAH-specific therapies is inconsistent as a result of the lack of understanding of the heterogeneity of patients with PH. METHODS A retrospective observational cohort study was conducted to understand the baseline characteristics, comorbidities, and treatment profiles of patients with PH in CLD in a real-world setting using a large-scale claims database (Medical Data Vision). Administrative and clinical data for patients admitted to acute-care hospitals in Japan between April 2008 and January 2021 were analyzed. RESULTS A total of 115,921 patients with CLD (109,578 with COPD and 6343 with ILD, of whom 569 and 176 had PH, respectively) were analyzed. This study found lower PH diagnosis rates among patients with COPD and patients with ILD than in previous studies. The majority of PH with CLD patients were elderly (mean age 75.7 years) and male (80.81%). Among patients with CLD prescribed PAH-specific therapies (105 patients with COPD; 64 patients with ILD), most received these as monotherapy (COPD, 84.76%; ILD, 75.56%); the most common were phosphodiesterase 5 inhibitors (COPD, 42.70%; ILD, 18.37%), prostacyclins (oral; COPD, 48.31%; ILD, 24.49%), and endothelin receptor antagonists (ERA) (COPD, 8.99%; ILD, 18.37%). Comorbidities (e.g., pulmonary, cardiac, kidney), home oxygen therapy (HOT), and echocardiography (ECHO) were factors associated with the diagnosis of PH. CONCLUSION This is the first study using an administrative database that provides real-world data on patients with PH in CLD in Japan. Our results indicate that PH may be misdiagnosed or underdiagnosed in Japan which may lead to suboptimal treatment for patients, and supports the need for further evidence to guide appropriate treatment.
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Affiliation(s)
- Kazuki Kitahara
- Medical Affairs, Janssen Pharmaceutical K.K., 3-5-2 Nishikanda, Chiyoda-ku, Tokyo, 101-0065, Japan.
| | - Junichi Omura
- Medical Affairs, Janssen Pharmaceutical K.K., 3-5-2 Nishikanda, Chiyoda-ku, Tokyo, 101-0065, Japan
| | - Shingo Wada
- Real World Evidence Solutions, IQVIA Solutions Japan K.K., 4-10-18 Takanawa, Minato-ku, Tokyo, 108-0074, Japan
| | - Seok-Won Kim
- Real World Evidence Solutions, IQVIA Solutions Japan K.K., 4-10-18 Takanawa, Minato-ku, Tokyo, 108-0074, Japan
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Suzuki K, Yagi T, Kawakami J. Long-term efficacies of selective vasodilators in pulmonary arterial hypertension: a comprehensive comparison using a spontaneous reporting database. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024:10.1007/s00210-023-02929-0. [PMID: 38180559 DOI: 10.1007/s00210-023-02929-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Accepted: 12/23/2023] [Indexed: 01/06/2024]
Abstract
There is no clinical evidence of differences in drugs associated with long-term survival in patients with pulmonary arterial hypertension (PAH) due to the small population and lack of information on death in Japanese medical database systems. This study evaluated whether patient data from a spontaneous reporting database could be used for comparing the effects of pulmonary vasodilators on long-term survival in PAH patients. PAH patient data reported in the Japanese Adverse Drug Event Report (JADER) database from April 2004 to July 2022 were extracted. Kaplan-Meier curves were used to compare survival times. Adjusted hazard ratios (aHRs) for all-cause mortality were determined using Cox proportional hazards models. Of 1969 PAH patients reported in the JADER database, 1208 were included in the survival analyses. The patient demographics were similar to those of the PAH population reported in the Japan Pulmonary Hypertension Registry. Among drugs targeting the prostacyclin pathway, epoprostenol was most associated with long-term survival (aHR, 0.38; 95% confidence interval (CI), 0.23-0.64). The PAH patients treated with endothelin receptor antagonists had improved survival, especially among the macitentan users (aHR, 0.30; 95% CI, 0.22-0.42). Sildenafil was associated with a poor prognosis in the PAH patients (aHR, 1.56; 95% CI, 1.19-2.04). Although our results must be interpreted with caution due to several limitations inherent to spontaneous reporting databases, our approach using the JADER database for survival analysis may provide useful information in limited situations such as the treatment of rare diseases including PAH.
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Affiliation(s)
- Koji Suzuki
- Department of Hospital Pharmacy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Chuo-Ku, Hamamatsu, 431-3192, Japan.
| | - Tatsuya Yagi
- Department of Hospital Pharmacy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Chuo-Ku, Hamamatsu, 431-3192, Japan
| | - Junichi Kawakami
- Department of Hospital Pharmacy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Chuo-Ku, Hamamatsu, 431-3192, Japan
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Omura J, Makanji Y, Tanabe N, Yu DY, Tan JY, Lim S, Kouhkamari MH, Casorso J, Wu DBC, Bloomfield P. Comparative Treatment Persistence and Adherence to Endothelin Receptor Antagonists Among Patients with Pulmonary Arterial Hypertension in Japan: A Real-World Administrative Claims Database Study. Pulm Ther 2023; 9:511-526. [PMID: 37991630 PMCID: PMC10721767 DOI: 10.1007/s41030-023-00244-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 11/06/2023] [Indexed: 11/23/2023] Open
Abstract
INTRODUCTION Real-world data on the comparative effectiveness of endothelin receptor antagonists (ERAs; macitentan, bosentan, ambrisentan) for pulmonary arterial hypertension (PAH), particularly in Asian countries, are scarce. We evaluated the persistence of these ERAs before and after macitentan approval in Japan (2015). METHODS We used real-world data from the Japanese Medical Data Vision administrative claims database between April 2008 and November 2020. Patients with PAH were identified from the dataset. Persistence to ERA treatment before and after approval of macitentan in Japan was defined as the time between start of the index ERA and treatment discontinuation or death. Propensity score adjustment was applied to minimize confounding effects among treatment groups. RESULTS In the pre-macitentan approval cohort, 153 and 51 patients received bosentan and ambrisentan, respectively. In the post-macitentan approval cohort, 331, 284, and 91 patients received macitentan, bosentan, and ambrisentan, respectively. Unadjusted median persistence for ambrisentan- and bosentan-treated patients was 19 and 10 months, respectively (adjusted HR 0.87 [95% CI 0.61-1.24]; P = 0.434 [bosentan as reference]). In the post-macitentan approval cohort, unadjusted median persistence was 18 months for macitentan-treated patients versus 6 and 8 months for ambrisentan- and bosentan-treated patients, respectively. Adjusted HRs for ambrisentan and bosentan were 1.48 (95% CI 1.12-1.95; P = 0.006) and 1.63 (95% CI 1.30-2.04; P < 0.001 [macitentan as reference]), respectively. CONCLUSIONS Real-world data for Japanese patients with PAH showed that persistence was significantly higher for macitentan, versus ambrisentan and bosentan, since its approval.
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Affiliation(s)
| | - Yogeshwar Makanji
- Janssen Pharmaceutical Asia Pacific, 2 Science Park Dr, #07-13, Singapore, 118882, Singapore.
| | - Nobuhiro Tanabe
- Pulmonary Hypertension Center, Chibaken Saiseikai Narshino Hospital, Chiba, Japan
| | - Dae Young Yu
- Janssen Pharmaceutical Asia Pacific, 2 Science Park Dr, #07-13, Singapore, 118882, Singapore
| | - Jin Yu Tan
- Janssen Pharmaceutical Asia Pacific, 2 Science Park Dr, #07-13, Singapore, 118882, Singapore
| | | | | | | | - David Bin-Chia Wu
- Janssen Pharmaceutical Asia Pacific, 2 Science Park Dr, #07-13, Singapore, 118882, Singapore
| | - Paul Bloomfield
- Janssen Pharmaceutical Asia Pacific, 2 Science Park Dr, #07-13, Singapore, 118882, Singapore
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Omura J, Kitahara K, Takano M, Idehara K, Kim S. Real-world clinical practice of pulmonary arterial hypertension in Japan: Insights from a large administrative database. Pulm Circ 2023; 13:e12275. [PMID: 37649808 PMCID: PMC10462924 DOI: 10.1002/pul2.12275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 07/25/2023] [Accepted: 07/27/2023] [Indexed: 09/01/2023] Open
Abstract
Pulmonary arterial hypertension (PAH) is a fatal disease that often occurs at an early age. In recent years, aggressive treatment with multiple drugs from the early-stage diagnosis is expected to improve the prognosis. Indeed, a high rate of initial combination therapy and excellent treatment outcomes have been reported from specialized centers for PAH in Japan. However, information on PAH epidemiology, including non-PAH specialized centers in Japan, is unclear. To address the above, we conducted a retrospective observational cohort study from April 2008 to September 2020 using real-world evidence from a large-scale administrative database (Medical Data Vision) to examine baseline characteristics, comorbidities, and treatment profiles of Japanese patients with PAH. Five hundred and eighteen patients with PAH (treatment-naive PAH, age 67.2 ± 15.9) were identified through our comprehensive approach which combined PAH disease codes, medications, and diagnostic procedures. Moreover, we showed that a larger proportion of patients received monotherapy in their initial treatment (66%) compared to those receiving combination therapy (34%). During the 1-year follow-up after PAH diagnosis, 13% of patients increased their PAH medications while other patients either decreased their PAH medications (6%) or discontinued PAH treatment (27%). The 3- and 5-year event-free survival rates of all-cause death were 72% and 64%, respectively. This is the first large-scale administrative database study that provides insights into real-world PAH management in Japan. This study highlighted a different PAH clinical landscape which included a larger portion of the elderly population, higher initial monotherapy treatment, and lower survival rates than previous studies.
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Affiliation(s)
- Junichi Omura
- Medical AffairsJanssen Pharmaceutical K. K.TokyoJapan
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Tamura Y, Takeyasu R, Takata T, Miyazaki N, Takemura R, Wada M, Tamura Y, Abe K, Shigeta A, Taniguchi Y, Adachi S, Inami T, Tsujino I, Tahara N, Kuwana M. SATISFY-JP, a phase II multicenter open-label study on Satralizumab, an anti-IL-6 receptor antibody, use for the treatment of pulmonary arterial hypertension in patients with an immune-responsive-phenotype: Study protocol. Pulm Circ 2023; 13:e12251. [PMID: 37342675 PMCID: PMC10278205 DOI: 10.1002/pul2.12251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/09/2023] [Accepted: 06/01/2023] [Indexed: 06/23/2023] Open
Abstract
Pulmonary arterial hypertension (PAH), an intractable disease with a poor prognosis, is commonly treated using pulmonary vasodilators modulating the endothelin, cGMP, and prostacyclin pathway. Since the 2010s, drugs for treating pulmonary hypertension based on mechanisms other than pulmonary vasodilation have been actively developed. However, precision medicine is based on tailoring disease treatment to particular phenotypes by molecular-targeted drugs. Since interleukin-6 (IL-6) is involved in the development of PAH in animal models, and some patients with PAH have elevated IL-6 levels, the cytokine is expected to obtain potentials for therapeutic targeting. Accordingly, we identified a phenotype with elevated cytokine activity of the IL-6 family in the PAH population by combining case data extracted from the Japan Pulmonary Hypertension Registry with a comprehensive analysis of 48 cytokines using artificial intelligence clustering techniques. Including an IL-6 threshold ≥2.73 pg/mL as inclusion criteria for reducing the risk of insufficient efficacy, an investigator-initiated clinical study using satralizumab, a recycling anti-IL6 receptor monoclonal antibody, for patients with an immune-responsive phenotype is underway. This study is intended to test whether use of patient biomarker profile can identify a phenotype responsive to anti-IL6 therapy.
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Affiliation(s)
- Yuichi Tamura
- Pulmonary Hypertension CenterInternational University of Health and Welfare Mita HospitalTokyoJapan
- Department of CardiologyInternational University of Health and Welfare School of MedicineNaritaJapan
| | - Rika Takeyasu
- Pulmonary Hypertension CenterInternational University of Health and Welfare Mita HospitalTokyoJapan
| | | | - Naoki Miyazaki
- Department of Clinical and Translational Research CenterKeio UniversityTokyoJapan
| | - Ryo Takemura
- Department of Clinical and Translational Research CenterKeio UniversityTokyoJapan
| | - Michihiko Wada
- Department of Clinical and Translational Research CenterKeio UniversityTokyoJapan
| | - Yudai Tamura
- Pulmonary Hypertension CenterInternational University of Health and Welfare Mita HospitalTokyoJapan
- Department of CardiologyInternational University of Health and Welfare School of MedicineNaritaJapan
| | - Kohtaro Abe
- Department of Cardiovascular MedicineKyushu University HospitalFukuokaJapan
| | - Ayako Shigeta
- Department of RespirologyChiba University HospitalChibaJapan
| | - Yu Taniguchi
- Cardiovascular MedicineKobe University HospitalKobeJapan
| | - Shiro Adachi
- Department of CardiologyNagoya University HospitalNagoyaJapan
| | - Takumi Inami
- Department of Cardiovascular MedicineKyorin University HospitalTokyoJapan
| | - Ichizo Tsujino
- Division of Cardiovascular and Respiratory Innovative ResearchFaculty of Medicine, Hokkaido UniversitySapporoJapan
| | - Nobuhiro Tahara
- Division of Cardiovascular Medicine, Department of MedicineKurume University School of MedicineKurumeJapan
| | - Masataka Kuwana
- Department of Allergy and RheumatologyNippon Medical School HospitalTokyoJapan
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Tamura Y, Tamura Y, Taniguchi Y, Tsujino I, Inami T, Matsubara H, Shigeta A, Sugiyama Y, Adachi S, Abe K, Baba Y, Hatano M, Ikeda S, Kusunose K, Sugimura K, Usui S, Takeishi Y, Dohi K, Hasegawa-Tamba S, Horimoto K, Kikuchi N, Kumamaru H, Tatsumi K. Clinical Management and Outcomes of Patients With Portopulmonary Hypertension Enrolled in the Japanese Multicenter Registry. Circ Rep 2022; 4:542-549. [PMID: 36408361 PMCID: PMC9638513 DOI: 10.1253/circrep.cr-22-0098] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 09/07/2022] [Indexed: 02/12/2024] Open
Abstract
Background: Portopulmonary hypertension (PoPH) is one of the major underlying causes of pulmonary arterial hypertension (PAH). However, PoPH, especially treatment strategies, has been poorly studied. Therefore, this study evaluated current treatments for PoPH, their efficacy, and clinical outcomes of patients with PoPH. Methods and Results: Clinical data were collected for patients with PoPH who were enrolled in the Japan Pulmonary Hypertension Registry between 2008 and 2021. Hemodynamic changes, functional class, and clinical outcomes were compared between patients with PoPH treated with monotherapy and those treated with combination therapies. Clinical data were analyzed for 62 patients with PoPH, including 25 treatment-naïve patients, from 21 centers in Japan. In more than half the patients, PAH-specific therapy improved the New York Heart Association functional class by at least one class. The 3- and 5-year survival rates of these patients were 88.5% (95% confidence interval [CI] 76.0-94.7) and 80.2% (95% CI 64.8-89.3), respectively. Forty-one (66.1%) patients received combination therapy. Compared with patients who had received monotherapy, the mean pulmonary arterial pressure, pulmonary vascular resistance, and cardiac index were significantly improved in patients who had undergone combination therapies. Conclusions: Combination therapy was commonly used in patients with PoPH with a favorable prognosis. Combination therapies resulted in significant hemodynamic improvement without an increased risk of side effects.
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Affiliation(s)
- Yudai Tamura
- Cardiovascular Center, International University of Health and Welfare (IUHW) Mita Hospital Tokyo Japan
| | - Yuichi Tamura
- Pulmonary Hypertension Center, IUHW Mita Hospital Tokyo Japan
| | - Yu Taniguchi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine Kobe Japan
| | - Ichizo Tsujino
- Division of Respiratory and Cardiovascular Innovative Research, Faculty of Medicine, Hokkaido University Sapporo Japan
| | - Takumi Inami
- Department of Cardiovascular Medicine, Kyorin University School of Medicine Mitaka Japan
| | - Hiromi Matsubara
- National Hospital Organization Okayama Medical Center Okayama Japan
| | - Ayako Shigeta
- Department of Respirology, Graduate School of Medicine, Chiba University Chiba Japan
| | - Yoichi Sugiyama
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kurume University School of Medicine Kurume Japan
| | - Shiro Adachi
- Department of Cardiology, Nagoya University Hospital Nagoya Japan
| | - Kohtaro Abe
- Department of Cardiovascular Medicine, Kyushu University Graduate School of Medical Sciences Fukuoka Japan
| | - Yuichi Baba
- Department of Cardiology and Geriatrics, Kochi Medical School, Kochi University Nankoku Japan
| | - Masaru Hatano
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo Tokyo Japan
| | - Satoshi Ikeda
- Department of Cardiovascular Medicine, Nagasaki University Graduate School of Biomedical Sciences Nagasaki Japan
| | - Kenya Kusunose
- Department of Cardiovascular Medicine, Tokushima University Hospital Tokushima Japan
| | | | - Soichiro Usui
- Department of Cardiovascular Medicine, Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | - Yasuchika Takeishi
- Department of Cardiovascular Medicine, Fukushima Medical University Fukushima Japan
| | - Kaoru Dohi
- Department of Cardiology and Nephrology, Mie University Graduate School of Medicine Tsu Japan
| | - Saki Hasegawa-Tamba
- Department of Cardiology, Saitama Medical University International Medical Center Hidaka Japan
| | - Koshin Horimoto
- Department of Cardiology, Matsuyama Red Cross Hospital Matsuyama Japan
| | - Noriko Kikuchi
- Department of Cardiology, Tokyo Women's Medical University Tokyo Japan
| | - Hiraku Kumamaru
- Department of Healthcare Quality Assessment, Graduate School of Medicine, The University of Tokyo Tokyo Japan
| | - Koichiro Tatsumi
- Department of Respirology, Graduate School of Medicine, Chiba University Chiba Japan
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