Dr Colin Mendelsohn was a general practitioner for twenty-seven years with a special focus on smoking and he now works exclusively in tobacco treatment in Sydney, helping smokers to quit. He was the Founding Chairman of the Australian Tobacco Harm Reduction Association (ATHRA) and has been a vocal advocate for vaping nicotine in Australia. He is also a member of the committee that develops the Royal Australian College of General Practitioners' national smoking cessation guidelines.He has written many peer-reviewed articles on smoking and vaping in scientific journals and has conducted hundreds of lectures, workshops and seminars for health professionals on smoking and vaping, more than anyone else in Australia. Dr Mendelsohn was a Conjoint Associate Professor in the School of Public Health and Community Medicine at the University of New South Wales, Sydney from 2016-2019. He is an investigator on a current government-funded (NHMRC) trial on vaping nicotine and have served on the NSW Health advisory committee on e-cigarettes.He is a member of the Vaping Cessation Expert Panel at the Centre for Addiction and Mental Health (Toronto, Canada), which is developing guidelines for ceasing vaping for the Ontario Ministry of Health. And also on the Expert Advisory Group for the Coalition of Asia Pacific Tobacco Harm Reduction Association (CAPHRA).Dr Colin Mendelsohn was previously Vice President of the Australian Association of Smoking Cessation Professionals, Australia's peak body for health professionals who help smokers quit. You can visit his website for more information about at www.colinmendelsohn.com.au.