title: Letter: Internal mammary arteriography prior to coronary bypass.
mesh_terms: D000328:Adult; D000368:Aged; D000792:Angiography; D001026:Coronary Artery Bypass; D006801:Humans; D008875:Middle Aged; D013895:Thoracic Arteries / Q000000981:diagnostic imaging*; D013997:Time Factors