Taha, Sami, Ibnuof, Mohammed, Masaad, AbdAlMagid, Mohammed, Mohamed EL-Imam, Mohammed, Kamal, Mustafa, Gamal, AND Yaseen, Diaa. " Diagnosis of gall bladder agenesis is a pitfall" Gezira Journal of Health Sciences [Online], Volume 8 Number 2 (1 December 2012)