Jovanovic Ivan, Fry Lucia C, Mönkemüller Klaus
Clinic for Gastroenterology and Hepatology, Clinical Center of Serbia, Faculty of Medicine, University of Belgrade, Belgrade, Serbia.
Clin Gastroenterol Hepatol. 2011 Mar;9(3):A28. doi: 10.1016/j.cgh.2010.11.003. Epub 2010 Nov 17.