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Full text from the Univ. of Michigan Library free resource MLibrary (Deep Blue) http://hdl.handle.net/2027.42/38227
Angina free resource MedlinePlus Health Information https://medlineplus.gov/angina.html
subscription/membership/fee required Wiley https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0098-6569&date=1998&volume=44&issue=4&spage=407