RT Journal Article SR Electronic T1 Physical Activity and Coronary Heart Disease–Reply–I JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 449 OP 450 DO 10.3122/jabfm.5.4.449 VO 5 IS 4 A1 Eaton, Charles B. YR 1992 UL http://www.jabfm.org/content/5/4/449.abstract AB