NASEM(National Academies of Science Engineering and Medicine) press summary
Royal College of Physicians(RCP)
Public Health England(PHE)
Global State of Tobacco Harm Reduction
ASH(Action on Smoking and Health)Fact Sheets
COT(Committee of Toxicity of Chemicals in Food,Consumer Products and Environment)reaction by Science Media Centre
Cochrane Review 2020
Buchanan et al Review