A Prospective Double Blind Study of Comparison of Postoperative Analgesic Efficacy of Caudal Ropivacaine Supplemented with Caudal or Intravenous Clonidine in Children Undergoing Subumblical Surgery. Journal title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) Authors: Nusrat Jehan, Mubasher Ahmad, Fauzia Shiffat, Hina Bashir Subject(s):