1. Bartoli E, Capron JP. [Epidemiology and natural history of cholelithiasis]. Rev Prat 2000;50:2112-2116.
2. Darko R, Archampong EQ, Qureshi Y, Muphy GM, Dowling RH. How often are Ghananian gallbladder stones cholesterol-rich. West Afr J Med 2000;19:64-70.
3. Gallstones in sickle cell disease: Observations from The Jamaican Cohort Study
4. Akute OO, Marinho AO, Kalejaiye AO, Sogo K. Prevalence of gall stones in a group of antenatal women in Ibadan, Nigeria. Afr J Med Med Sci 1999;28:159-161.