00406nas a2200181   4500000000100000000000100001008004100002100001400043700001200057700001800069700001200087700001600099700001200115245006400127300001100191490000800202022001400210       2005                            d1 aM. Hernan1 aS. Jick1 aG. Logroscino1 aM. Olek1 aA. Ascherio1 aH. Jick00aCigarette smoking and the progression of multiple sclerosis  a1461-50 v128  a0006-8950