RT Journal Article SR Electronic T1 Prevalence of the anatomic variations of the extra biliary ducts in Khartoum, Sudan JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1281 OP 1282 VO 25 IS 9 A1 Al-Tigani, Hamid A. A1 Bakheit, Mohamed A. YR 2004 UL http://smj.org.sa/content/25/9/1281.abstract AB