RT Journal Article SR Electronic T1 Aspirin for primary prevention JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 458 OP 458 DO 10.3949/ccjm.87c.08005 VO 87 IS 8 A1 Elise Henning YR 2020 UL http://www.ccjm.org/content/87/8/458.1.abstract AB