Long- and Short-term Effects of Tobacco Smoking on Circulating Concentrations of B Vitamins

A Ulvik, M Ebbing, S Hustad, O Midttun, O Nygard, S. E Vollset, K. H Bonaa, J. E Nordrehaug, D. W Nilsen, H Schirmer and P. M. Ueland

Clinical Chemistry 56 ( 5 ): 755 - 763 , 2010