1. Gallstones;Everhart,1994
2. Gallstones;Everhart,1998
3. Prevalence of gallstone disease in Hispanic populations in the United States;Maurer;Gastroenterology,1989
4. Plan and operation of the Third National Health and Nutrition Examination Survey, 1988–1994,1994
5. SUDAAN User's Manual, Release 6.0;Shah,1992