Goenka M K, Kochhar R, Gulati M, Singh G, Khanna S K, Mehta S K
Department of Gastroenterology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
J Clin Gastroenterol. 1994 Jul;19(1):85-6. doi: 10.1097/00004836-199407000-00023.