RT Journal Article SR Electronic T1 Intravenous patient-controlled analgesia for labor pain JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 691 OP 693 VO 24 IS 6 A1 Anwari, Jamil S. A1 Ehsan, Faisal M. A1 Al-Dar, Muhammad M. YR 2003 UL http://smj.org.sa/content/24/6/691.abstract AB