RT Journal Article SR Electronic T1 The role of multiple risk factors in cardiovascular morbidity and mortality JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 211 OP 218 VO 60 IS 3 A1 Ray W. Gifford, Jr YR 1993 UL http://www.ccjm.org/content/60/3/211.abstract AB