Chronic E Cigarette Use Impairs Endothelial Function on the Physiological and Cellular Levels Arteriosclerosis, Thrombosis, and Vascular Biology Level and timing of product substitution in a trial of e cigarettes for smokers not interested in quitting Differential effects of traditional cigarette, electronic cigarette, and tobacco heating product on human vascular smooth muscle cell phenotypic switch: A comparative functional perspective ScienceDirect Differential effects of traditional cigarette, electronic cigarette, and tobacco heating product on human vascular smooth muscle cell phenotypic switch: A comparative functional perspective Atherosclerosis