Sources:
Di Pauli F, Reindl M, Ehling R, Schautzer F, Gneiss C, Lutterotti A, O'Reilly E, Munger K, Deisenhammer F, Ascherio A, Berger T. Smoking is a risk factor for early conversion to clinically definite multiple sclerosis. Mult Scler. 2008 Sep;14(8):1026-30.
Ghadirian P, Dadgostar B, Azani R, Maisonneuve P. “A case-control study of the association between socio- demographic, lifestyle and medical history factors and multiple sclerosis.” Can J Publ Health 2001; 92: 281.
Hawkes CH. Smoking is a risk factor for multiple sclerosis: a metanalysis. Mult Scler. 2007 Jun;13(5):610-5.
Hernan MA, Oleky MJ, Ascherio A. “Cigarette smok- ing and incidence of multiple sclerosis.” Am J Epidemiol 2001; 154: 69
Sundström P, Nyström L, Hallmans G. Smoke exposure increases the risk for multiple sclerosis. Eur J Neurol. 2008 Jun;15(6):579-83.

