00338nas a2200133   4500000000100000000000100001008004100002100001200043700001400055245010400069300001000173490000700183022001400190       2012                            d1 aS. Jick1 aD. Pennap00aDrospirenone- and levonorgestrel-containing oral contraceptives and the risk of gallbladder disease  a220-30 v86  a0010-7824