<prompt> All are true predisposing factors for gallstone formation, except:Weight loss leads to mobilization of tissue cholesterol leads to increased biliary cholesterol secretion while enterohepatic circulation of bile acids is decreasedEstrogens inhibits hepatic lipoprotein receptors, decrease uptake of dietary cholesterol, and increase biliary cholesterol absorptionGallbladder hypomotility leading to stasis and formation of sludgeClofibrate therapy: Increased biliary secretion of cholesterol  <response>: All others are true. Estrogens stimulate hepatic lipoprotein receptors, increase uptake of dietary cholesterol, and increase biliary cholesterol secretion, and leads to gallstone formation. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 2618, Table 311-1 