Título original
[Smoking is a Risk Factor for Multiple Sclerosis]

Título en castellano
El Tabaquismo es un Factor de Riesgo de Esclerosis Múltiple

Autores
Riise T, Nortvedt M, Ascherio A

Institución
Department of Public Health and Primary Health care, Section of Occupational Medicine, University of Bergen; Faculty of Health and Social Sciences, Bergen University College, ; Departments of Nutrition and Epidemiology, Harvard School of Public Health, and Channing Laboratory, Department of Medicine, Harvard Medical School and Brigham and Women´s Hospital, Boston, EE.UU.