RT Journal Article SR Electronic T1 Intrathecal Morphine in OB JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 139 OP 139 DO 10.3122/jabfm.2.2.139 VO 2 IS 2 A1 Edwards, Rick YR 1989 UL http://www.jabfm.org/content/2/2/139.1.abstract AB