Patient Perspectives on Discussions of Electronic Cigarettes in Primary Care Fagerstrm Test for Nicotine Dependence Do family physicians perceive electronic cigarette use as a harm reduction strategy for smokers? A survey from Istanbul Primary Health Care Research & Development Cambridge Core Electronic Cigarettes and Tobacco Product Cessation: A Survey of Healthcare Providers' Opinions on Safety and Recommendation Prise en charge de la dpendance tabagique ScienceDirect