1. Nakayama F, Soloway RD, Nakama T, Miyazaki K, Ichimiya H, Sheen PC, Ker CG, Ong GB, Choi TK, Boey J, 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. Wei TC, Hsu SC: Transduodenal sphincteroplasty in the treatment of intrahepatic stones. J Surg Assoc ROC 9:1?16, 1975
4. Hsu SC, Ho KJ, Chen JS, Chen YR: Biliary composition and excretion in Chinese and its relationship to cholelithiasis. II. Epidemiological and pathological studies. J Formosan Med Assoc 78:670?687, 1979
5. Wang YH: The use of operative choledochoscope. J Formosan Med Assoc 81:140?143, 1982