00428nas a2200181   4500000000100000000000100001008004100002100001400043700001200057700001200069700001600081700001200097700001400109245007300123300001100196490000700207022003200214       2005                            d1 aA. Alonso1 aS. Jick1 aM. Olek1 aA. Ascherio1 aH. Jick1 aM. Hernan00aRecent use of oral contraceptives and the risk of multiple sclerosis  a1362-50 v62  a0003-9942 (Print) 0003-9942