00377nas a2200145   4500000000100000000000100001008004100002100001300043700001200056700001200068245010100080300001100181490000700192022003200199       2002                            d1 aC. Black1 aJ. Kaye1 aH. Jick00aClinical risk factors for venous thromboembolus in users of the combined oral contraceptive pill  a637-400 v53  a0306-5251 (Print) 0306-5251