1. Brennan TJ, Kehlet H. Preventive analgesia to reduce wound hyperalgesia and persistent postsurgical pain: not an easy path. Anesthesiology 2005; 103: 681-3.
2. Size M, Soyannwo OA, Justins DM. Pain management in developing countries. Anaesthesia 2007; 62(Suppl 1): 38-43.
3. Faponle AF, Soyannwo OA, Ajayi IO. Post operative pain therapy: a survey of prescribing patterns and adequacy of analgesia in Ibadan, Nigeria. Cent Afr J Med 2001; 47: 70-4.
4. Kolawole IK, Fawole AA. Postoperative pain management following caesarean section in University of Ilorin Teaching Hospital (UITH), Ilorin, Nigeria. West Afr J Med 2003; 22: 305-9.
5. Ocitti EF, Adwok JA. Post-operative management of pain following major abdominal and thoracic operations. East Afr Med J 2000; 77: 299-302.