Tobacco and COPD: presenting the World Health Organization (WHO) Tobacco Knowledge Summary Respiratory Research Springer Nature Link Vaping and COPD: Is it okay or can it cause more problems? Association of electronic cigarette use and risk of COPD: a systematic review and meta analysis npj Primary Care Respiratory Medicine Will chronic e cigarette use cause lung disease? Thoracic and Sleep Group Queensland Cardiopulmonary Impact of Electronic Cigarettes and Vaping Products: A Scientific Statement From the American Heart Association Circulation