Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) WANG SW,Acute myocardial infarction in elderly Chinese. A clinical analysis of 631 cases and comparison with 389 younger cases,Jpn Heart J,,,1988,29,,301-307,https://cir.nii.ac.jp/crid/1570572699995217920,