Warnnissorn, N. , Atisook, K. , Lohsirirwat, D. , Ratanarapee, S. , Laohaudomphan, P. and Netsakhon, S. 2003. Isospora belli infection associated with Chronic Cholecystitis and Sclerosing Cholangitis in Immuncompetent Host : A Case Report. Siriraj Medical Journal. 55, 7 (Jul. 2003), 419–424.