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Information retrieval system for Japanese Standard Disease-code Master Using XML Web Service. <i>AMIA Annu Symp Proc<\/i> 2003; 2003: 859."},{"key":"9","doi-asserted-by":"crossref","unstructured":"9. Nakai M, Iwanaga Y, Sumita Y, Kanaoka K, Kawakami R, Ishii M, et al. Validation of acute myocardial infarction and heart failure diagnoses in hospitalized patients with the nationwide claim-based JROAD-DPC database. <i>Circ Rep<\/i> 2021; 3: 131\u2013136.","DOI":"10.1253\/circrep.CR-21-0004"},{"key":"10","doi-asserted-by":"crossref","unstructured":"10. Sugimoto T, Mizuno A, Yoneoka D, Matsumoto S, Matsumoto C, Matsue Y, et al. Cardiovascular hospitalizations and hospitalization costs in Japan during the COVID-19 pandemic. <i>Circ Rep<\/i> 2023; 5: 381\u2013391.","DOI":"10.1253\/circrep.CR-23-0072"},{"key":"11","doi-asserted-by":"crossref","unstructured":"11. Nakao K, Yasuda S, Nishimura K, Noguchi T, Nakai M, Miyamoto Y, et al. Prescription rates of guideline-directed medications are associated with in-hospital mortality among Japanese patients with acute myocardial infarction: A report from JROAD-DPC study. <i>J Am Heart Assoc<\/i> 2019; 8: e009692.","DOI":"10.1161\/JAHA.118.009692"},{"key":"12","doi-asserted-by":"crossref","unstructured":"12. Nakai M, Iwanaga Y, Sumita Y, Wada S, Hiramatsu H, Iihara K, et al. Associations among cardiovascular and cerebrovascular diseases: Analysis of the nationwide claims-based JROAD-DPC dataset. <i>PLoS One<\/i> 2022; 17: e0264390.","DOI":"10.1371\/journal.pone.0264390"},{"key":"13","doi-asserted-by":"crossref","unstructured":"13. Kimura M, Matoba T, Nakano Y, Katsuki S, Sakamoto K, Nishihara M, et al. 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