Amila Ratnayake1, Tamara J Worlton2. 1. Military Hospital Narahenpita, 08 Elvitigala Mawatha, Colombo, 00800, Sri Lanka. 2. Department of General Surgery, Walter Reed National Military Medical Center, 8901 Wisconsin Ave, Bethesda, MD, 20889, USA. Taworlto@yahoo.com.