1. Nakayama F, Soloway RD, Nakama T, Miyazaki K, Ichimiya H, Sheen PC, Ker CG, Ong GB, Choi TK, Boey F, Foong WC, Tan EC, Tung KH, Lee CN: Hepatolithiasis in East Asia—retrospective study. Dig Dis Sci 31:21–26, 1986
2. Ker CG, Huang TJ, Sheen PC: Intrahepatic stones: 1. Etiological study. J Formosan Med Assoc 80:698–711, 1981
3. Hsu SC, Ho KJ, Chen JS, Chen YR: Biliary composition and excretion in Chinese and its relationship to cholethiasis. II. Epidemiological and pathological studies. J Formosan Med Assoc 78:670–687, 1979
4. Su CH, Lui WY, Peng FK: Relative prevalence of gallstone diseases in Taiwan: A nationwide cooperative study. Dig Dis Sci 37:764–768, 1992
5. Ker CG, Lee KT, Sheen PC, Wei TC, Wu CW, Lui WY, Peng FK, Lin FY, Ho LC, Wang YH: A study of 1211 patients with intrahepatic stones in Taiwan. Asian J Surg 13:102–105, 1990