D Nageshwar Reddy1, P V J Sriram, G V Rao, D Bhaskar Reddy. 1. Department of Gastroenterology, Gastrointestinal Surgery and Gastrointestinal Pathology, Asian Institute of Gastroenterology, 6-3-652, Somajiguda, Hyderabad 500082, India. nage@satyam.net.in