3Katsika D, Grjibovski A, Einarsson C, et al.Genetic and environmental influences on symptomatic gallstone disease: a Swedish study of 43411 twin pairs[J].Tepatology,2005, 41(5): 1138-1143.
5Panpimanmas S, Manmee C. Risk factors for gallstone disease in aThai population[ J]. J Epidemiol ,2009,19(3):116-121.
6Nomura H, Kashiwagi S, Hayashi J, et al. Prevalence of gallstonedisease in a general population of Okinawa, Japan [ J ]. Am J Epide-miol, 1988 ,128 (3 ) :598 -605.
7Einarsson K, Nilsell K, Leijd B, et al. Influence of age on secretionof cholesterol and synthesis of bile acids by the liver [ J ]. N Engl JMed,1985,313(5) :277 -282.
