1. Survival tables;Armitage,1974
2. Natural history of gallstones;Attili,1989
3. A population study on the prevalence of gallstone disease: the Sirmione study;Barbara;Hepatology,1987
4. Incidence and risk factors for gallstone disease: the ‘Sirmione study’;Barbara;Gastroenterology International,1988
5. The natural history of gallstones: 5-year follow-up in the ‘Sirmione study’;Barbara;Journal of Hepatology,1988