Toxicological Aspects Associated with Consumption from Electronic Nicotine Delivery System (ENDS): Focus on Heavy Metals Exposure and Cancer Risk Impact of the FDA flavour enforcement policy on flavoured electronic cigarette use behaviour changes Tobacco Control Vaping and the Brain: Effects of Electronic Cigarettes and E Liquid Substances The Journal of Neuropsychiatry and Clinical Neurosciences US FDA gives marketing nod to an e cigarette for the first time, ETBrandEquity