June 12, 2008 - The higher the level of nicotine in the toenails, the higher the risk of coronary heart disease (CAD), no matter the number of cigarettes smoked or level of exposure to second hand smoke, said researchers from University of California, San Diego, School of Medicine, who ran the study in collaboration with colleagues from Harvard University.
Study results were published in the online edition of the American Journal of Epidemiology, April 2008, and also appear in the June print edition.