RT Journal Article SR Electronic T1 Exercise Dependence in a Pregnant Runner JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 118 OP 121 DO 10.3122/jabfm.9.2.118 VO 9 IS 2 A1 Spieker, Michael R. YR 1996 UL http://www.jabfm.org/content/9/2/118.abstract AB