Ahmed, S., Hossain, M.M. and Khatun, U.S. 2014. Pre-emptive analgesia : effect of low dose Ketamine as pre-emptive analgesia in postoperative pain management after lower abdominal surgery. Journal of the Bangladesh Society of Anaesthesiologists. 17, 1 (Feb. 2014), 17–22. DOI:https://doi.org/10.3329/jbsa.v17i1.4046.