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Yamashita S, Saotome M, Satoh H, Kajihara J, Mochizuki Y, Mizuno K, Nobuhara M, Miyajima K, Kumazawa A, Tominaga H, Takase H, Tawarahara K, Wakahara N, Matsunaga M, Wakabayashi Y, Matsumoto Y, Terada H, Sano M, Ohtani H, Urushida T, Hayashi H, Ishii S, Maruyama H, Maekawa Y. Plasma Globotriaosylsphingosine Level as a Primary Screening Target for Fabry Disease in Patients With Left Ventricular Hypertrophy. Circ J 2019; 83:1901-1907. [DOI: 10.1253/circj.cj-19-0110] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Hiroki Maruyama
- Department of Clinical Nephroscience, Niigata University Graduate School of Medicine and Dental Science
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Sugie K, Sugie M, Taoka T, Tonomura Y, Kumazawa A, Izumi T, Ueno S, Kichikawa K. Characteristic MRI findings of upper limb muscle involvement in myotonic dystrophy type 1. Neuromuscul Disord 2015. [DOI: 10.1016/j.nmd.2015.06.312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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3
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Kumazawa A, Katoh H, Nonaka D, Watanabe T, Saotome M, Urushida T, Satoh H, Hayashi H. Microtubule Disorganization Affects the Mitochondrial Permeability Transition Pore in Cardiac Myocytes. Circ J 2014; 78:1206-15. [DOI: 10.1253/circj.cj-13-1298] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Azumi Kumazawa
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine
| | - Hideki Katoh
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine
| | - Daishi Nonaka
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine
| | - Tomoyuki Watanabe
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine
| | - Masao Saotome
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine
| | - Tsuyoshi Urushida
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine
| | - Hiroshi Satoh
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine
| | - Hideharu Hayashi
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine
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Nonaka D, Katoh H, Kumazawa A, Saotome M, Urushida T, Satoh H, Hayashi H. Non-secretory renin prevents ischemic injury by modulating mitochondrial function in diabetic heart. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Kumazawa A, Mita N, Hirasawa M, Adachi T, Suzuki H, Shafeghat N, Kulkarni AB, Mikoshiba K, Inoue T, Ohshima T. Cyclin-dependent kinase 5 is required for normal cerebellar development. Mol Cell Neurosci 2012; 52:97-105. [PMID: 23085039 DOI: 10.1016/j.mcn.2012.10.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Accepted: 10/12/2012] [Indexed: 10/27/2022] Open
Abstract
Cyclin-dependent kinase 5 (Cdk5) is a serine/threonine kinase, and its kinase activity is dependent upon its association with either of the activating subunits p35 or p39, which are mainly expressed in neurons. We previously reported that Cdk5 knockout (KO) mice exhibit perinatal lethality, defective neuronal migration, and abnormal positioning of neurons in the facial motor nucleus and inferior olive in the hindbrain and Purkinje cells (PCs) in the cerebellum. In this study, we focused on the analysis of the role of Cdk5 in cerebellar development. For this purpose we generated midbrain-hindbrain-specific Cdk5 conditional knockout (MHB-Cdk5 KO) mice because the cerebellum develops postnatally, whereas Cdk5 KO mice die perinatally. Histological analysis of the MHB-Cdk5 KO mice revealed a significant size reduction of the cerebellum. In addition, profound disturbance of inward migration of granule cells (GC) was observed in the developing cerebellum. A normal dendritic development of the Purkinje cells (PCs) was disturbed in MHB-Cdk5 KO mice. Cultured Cdk5-null PCs showed similar dendritic abnormalities. These results indicate that Cdk5/p35 plays an important role in neuronal migration of PCs and GCs and dendrite formation of PCs in cerebellar development.
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Affiliation(s)
- A Kumazawa
- Laboratory for Molecular Brain Science, Department of Life Science and Medical Bioscience, Science and Engineering, Waseda University, Tokyo 162-8480, Japan
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Saitoh T, Satoh H, Kumazawa A, Nobuhara M, Machii M, Tanaka T, Shiraki K, Saotome M, Urushida T, Katoh H, Hayashi H. Ultrasound analysis of the relationship between right internal jugular vein and common carotid artery in the left head-rotation and head-flexion position. Heart Vessels 2012; 28:620-5. [DOI: 10.1007/s00380-012-0283-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Accepted: 08/10/2012] [Indexed: 10/27/2022]
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Watanabe T, Saotome M, Kumazawa A, Urushida T, Katoh H, Satoh H, Terada H, Yamashita K, Shiya N, Hayashi H. Giant and aneurysmal left circumflex coronary fistula to coronary sinus-Cardiovascular computed tomography imaging before and after surgical operation. J Cardiol Cases 2012; 5:e96-e99. [PMID: 30532914 DOI: 10.1016/j.jccase.2012.02.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Revised: 01/06/2012] [Accepted: 02/01/2012] [Indexed: 11/16/2022] Open
Abstract
An asymptomatic 43-year-old woman visited our hospital for differential diagnosis of cardiac murmur. The transthoracic echocardiogram exhibited a dilated duct, which had turbulently accelerated color Doppler flow behind left ventricle. The coronary angiography (CAG) revealed a marked dilated left circumflex artery (LCX), which appeared to connect to coronary sinus (CS), indicating coronary artery fistula. However, it was difficult to define the drainage site of fistula in CAG, because the imaging contrast was insufficient for markedly dilated LCX. The drainage site of fistula to CS was finally defined by electrocardiogram-gated 64-multi-detector computed tomography (MDCT), and MDCT revealed the LCX aneurysm in the termination site of fistula. The patient underwent ligation of LCX-CS fistula and direct closure of coronary aneurysm. After the operation, no residual coronary fistula flow was detected either by CAG or MDCT. We present here a patient with coronary aneurysm associated with coronary fistula (CAACF), who underwent surgical operation, and suggest that MDCT is a helpful modality for the diagnosis of CAACF.
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Affiliation(s)
- Tomoyuki Watanabe
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Masao Saotome
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Azumi Kumazawa
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Tsuyoshi Urushida
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hideki Katoh
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hiroshi Satoh
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hitoshi Terada
- Division of Cardiovascular Surgery, 1st Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Katsushi Yamashita
- Division of Cardiovascular Surgery, 1st Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Norihiko Shiya
- Division of Cardiovascular Surgery, 1st Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hideharu Hayashi
- Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine, Hamamatsu, Japan
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Sato Y, Miyao M, Watanabe T, Shimaoka K, Sakai E, Kumazawa A, Oshida Y. Follow-up studies of group behavior therapy for obese Japanese patients. Scand J Med Sci Sports 2007. [DOI: 10.1111/j.1600-0838.1992.tb00345.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Shirohzu H, Kubota T, Kumazawa A, Sado T, Chijiwa T, Inagaki K, Suetake I, Tajima S, Wakui K, Miki Y, Hayashi M, Fukushima Y, Sasaki H. Three novel DNMT3B mutations in Japanese patients with ICF syndrome. Am J Med Genet 2002; 112:31-7. [PMID: 12239717 DOI: 10.1002/ajmg.10658] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
ICF syndrome is a rare autosomal recessive disorder characterized by immunodeficiency, centromeric instability, and facial anomalies. It is caused by mutations in a de novo DNA methyltransferase gene, DNMT3B. We here report the first three Japanese cases of ICF syndrome from two unrelated families. All patients had typical facial dysmorphism and immunoglobulin A (IgA) deficiency, but none of them had apparent mental retardation. Cytogenetic analysis of peripheral blood lymphocytes showed chromosomal abnormalities, including multiradial configurations and a stretching of the pericentromeric heterochromatin of chromosomes 1 and 16. Hypomethylation of classical satellite 2 DNA was also observed. Mutation analyses of DNMT3B revealed three novel mutations: patient 1 from the first family was a compound heterozygote for a nonsense mutation (Q42Term) and a missense mutation (R832Q); patients 2 and 3 from the second family were both homozygous for a missense mutation (S282P). The R832Q mutation occurred within the conserved methyltransferase domain, and thus may affect the enzyme activity directly. The S282P mutation, on the other hand, occurred close to the PWWP domain, which is presumably involved in protein-protein interaction. This is the first missense mutation mapped to the N-terminal half of the protein, suggesting that the region plays an important role in the regulation of the DNMT3B enzyme.
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Affiliation(s)
- Hisao Shirohzu
- Division of Human Genetics, Department of Integrated Genetics, National Institute of Genetics, Mishima, Japan
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Ando M, Yamamoto M, Kitagawa C, Kumazawa A, Sato M, Shima K, Watanabe A, Shimokata K, Hasegawa Y. Autologous blood-patch pleurodesis for secondary spontaneous pneumothorax with persistent air leak. Respir Med 1999; 93:432-4. [PMID: 10464827 DOI: 10.1053/rmed.1999.0567] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- M Ando
- First Department of Internal Medicine, Nagoya University School of Medicine, Japan
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Sugiyama K, Kumazawa A, Zhou H, Saeki S. Dietary methionine level affects linoleic acid metabolism through phosphatidylethanolamine N-methylation in rats. Lipids 1998; 33:235-42. [PMID: 9560797 DOI: 10.1007/s11745-998-0201-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The effects of dietary methionine level on the profiles of fatty acids and phospholipids and on the plasma cholesterol concentration were investigated to confirm whether the methionine content of dietary proteins is one of the major factors that cause differential effects on lipid metabolism. The effect of dietary supplementation with eritadenine, which is shown to be a potent inhibitor of phosphatidylethanolamine (PE) N-methylation, was also investigated. Rats were fed six diets containing casein (100 g/kg) and amino acid mixture (86.4 g/kg) differing in methionine content (2.5, 4.5, and 7.5 g/kg) and without or with eritadenine supplementation (30 mg/kg) for 14 d. The ratio of arachidonic to linoleic acid of liver microsomal and plasma phosphatidylcholine (PC) was significantly increased as the methionine level of diet was elevated, indicating that dietary methionine stimulates the metabolism of linoleic acid. The PC/PE ratio of liver microsomes and the plasma cholesterol concentration were also increased by dietary methionine. These effects of methionine were completely abolished by eritadenine supplementation The S-adenosylmethionine concentration in the liver reflected the methionine level of diet. These results support the idea that the differential effects of dietary proteins on lipid metabolism might be ascribed, at least in part, to their different methionine contents, and that methionine might exert its effects through alteration of PE N-methylation.
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Affiliation(s)
- K Sugiyama
- Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, Japan.
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Sugiyama K, Yamakawa A, Kumazawa A, Saeki S. Methionine content of dietary proteins affects the molecular species composition of plasma phosphatidylcholine in rats fed a cholesterol-free diet. J Nutr 1997; 127:600-7. [PMID: 9109611 DOI: 10.1093/jn/127.4.600] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The effects of dietary protein types and methionine supplementation on phospholipid metabolism were investigated to clarify the mechanism of the hypocholesterolemic action of soybean protein in rats fed a cholesterol-free diet. The effect of switching from a casein diet to a soybean protein diet was also investigated. Rats were fed casein, soybean protein or soybean protein + methionine diet for 14 d. Compared with casein diet, feeding of soybean protein diet led to significantly higher proportions of linoleic acid and linoleic acid-containing molecular species, especially 16:0-18:2, in plasma and liver microsomal phosphatidylcholine (PC). In addition, significantly lower plasma cholesterol concentration, hepatic S-adenosylmethionine concentration and liver microsomal PC:phosphatidylethanolamine ratio resulted. These alterations caused by the soybean protein diet were significantly suppressed by supplementing methionine to the level of the casein diet (3.4 g/kg diet). The proportion of the sum of certain plasma PC molecular species, which contain 18:1 or 18:2 in the sn-2 position, increased in response to the switch from the casein diet to the soybean protein diet at a rate similar to the decrease in plasma cholesterol concentration; there was a significant correlation between the two variables (r = -0.992, P < 0.001). These results indicate that about 40% of the hypocholesterolemic action of soybean protein is due to the low methionine content of the protein and might be associated with alterations of the plasma phospholipid molecular species profile.
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Affiliation(s)
- K Sugiyama
- Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, Japan
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Yamazaki K, Nakazawa T, Matsunaga M, Kumazawa A, Kaneko T, Wakabayashi T. Behavioral study on the gracile axonal dystrophy (GAD) mutant mouse. Jikken Dobutsu 1992; 41:523-7. [PMID: 1451762 DOI: 10.1538/expanim1978.41.4_523] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We investigated motor function and pain sensation in the gracile axonal dystrophy (GAD) mutant mouse, using the tail-flick test and the rotarod test. GAD (gad/gad) and normal sib mice (gad/+ or +/+) were used between 5 and 11 weeks of age, during which time the behavioral signs of GAD mice shifted from sensory ataxia (about 4 to 8 weeks of age) to paresis (after about 9 weeks of age). In the tail-flick test, significant shortening of latency was observed at 6 and 8 weeks of age in female GAD mice, in comparison with normal female mice. This may be related to dysfunction or degeneration of axons in the fasiculus gracilis, whose collaterals are thought to control the transmission of nociceptive information. In the rotarod test, a cumulative chi 2 test showed significant reduction in the performance times of GAD mice beginning at 5 and 6 weeks of age in males and females, respectively, indicating that the rotarod test can detect the development of motor incoordination as early as these ages. The performance times of GAD mice dropped sharply from 9 weeks of age onwards, and this is believed to reflect the progression of paresis. The rotarod test therefore appears to be a good method of quantifying behavioral changes in GAD mice and to be applicable both to objective selection of GAD mice before 8 weeks of age and to evaluation of drugs to treat ataxia or paresis.
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Affiliation(s)
- K Yamazaki
- Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan
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Yamazaki K, Kumazawa A, Ito K, Kurihara K, Nakayama M, Wakabayashi T. Convulsions in senescence-accelerated mice (SAM-R/1/Eis). Lab Anim Sci 1992; 42:378-81. [PMID: 1434499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Senescence-accelerated mice (SAM) are one of the animal models used for studying senescence, which consist of several substrains such as SAM-R/1, R/2, P/1, P/2. SAM-R/1/Eis maintained in Eisai Tsukuba Research Laboratories, Ibaraki, Japan, was originally introduced as a substrain of a normal control SAM-R/1 from Kyoto University, Japan. We have noted signs of convulsions in SAM-R/1/Eis mice during routine animal care, particularly while changing cages. We identified the clinical signs and determined the concentrations of glucose and immunoreactive insulin in plasma of SAM-R/1/Eis mice. There were no differences in the male:female ratios of mice showing prodrome only, grand mal, or no-signs. The ages at which prodrome and grand mal were first noted peaked between 20 and 25 weeks. Concentrations of glucose and immunoreactive insulin in plasma did not indicate the mice were in insulin hypoglycemia, which is one cause of convulsions. AKR strain mice, some of which originated with the SAM strain are known to become convulsive by repeated "throwing" stimulations. Conversely, in SAM-R/1/Eis, throwing stimuli are not needed to cause convulsive signs. Thus it is likely that in SAM-R/1/Eis mice the signs are triggered by repeating mild environmental changes, such as changing cages. The results of this study show that SAM-R/1/Eis is neither a normal control strain, nor an original SAM-R/1 strain. But it is possible that SAM-R/1/Eis is another useful animal model for studying spontaneous convulsion.
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Affiliation(s)
- K Yamazaki
- Tusukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan
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Yasuda T, Niwa T, Kumazawa A, Tsumita T, Nagai Y. Preparation of radioactive basic protein of bovine nervous tissue. Jpn J Exp Med 1977; 47:213-5. [PMID: 72176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Kumazawa A, Fujimasa I, Atsumi K. [Effect of ruby-laser on the rate of cell division in early embryonic development of sea urchins]. Iyodenshi To Seitai Kogaku 1973; 11:293-4. [PMID: 4799664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Narumi K, Arita M, Kitagawa M, Kumazawa A, Tsumita T. Gaschromatographic analysis of free myo- and scyllo-inositols in animal tissues. Jpn J Exp Med 1969; 39:399-407. [PMID: 4984379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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