OR16: Impact of Cholecystectomy on the Fecal Bile Acids Profile Before and After Roux en-Y Gastric Bypass. (September 2019) - Cardinelli, C.D.S.; Torrinhas, R.S.; Sala, P.; Machado, N.; Ravacci, G.; Canuto, G.; Tavares, M.; Waitzberg, D.