Bulletin of the World Health Organization 2009: volume 87, issue 8, pages 640 to 643
Drinkard CR, Sellers TA, Potter JD, Zheng W, Bostick RM, Nelson CL, Folsom AR: Association of body mass index and body fat distribution with risk of lung cancer in older women
Querbach at Romman said that 75 percent of the demand initially was for liquids with no nicotine, but that makers of the liquids were expanding their nicotine offerings
E-cigarettes have been found to contain carcinogens in trace amounts, including: Formaldehyde Acetaldehyde Various volatile organic compounds Nitrosamines Free radicals Toxic gasses (carbon monoxide, hydrogen sulfide, etc.) Heavy metals Carcinogens all have the potential to cause cancer or contribute to its development