Peter Hajek is Professor of Clinical Psychology and Director of the Tobacco Dependence Research Unit at the Wolfson Institute of Preventive Medicine, Queen Mary University of London. His research is concerned primarily with understanding health behaviours, and developing and evaluating both behavioural and pharmacological treatments for dependent smokers and for people with weight problems. Professor Hajek is a member of a number of expert groups, advisory bodies and editorial boards, and has authored or co-authored over 350 publications.

Samrat Chowdhery is a journalist and consumer advocate who has steered global and national movements for adult access to safer nicotine alternatives. He is the director of Association of Vapers India, among the oldest tobacco harm reduction-focused consumer nonprofits. He is a past president of International Network of Nicotine Consumer Organisations, an umbrella body of over 30 national groups. He was a recipient of Tobacco Harm Reduction Scholarships to investigate the efficacy and affordability of vaping and smokeless alternatives among bidi and khaini users in India and offers mentorship on advocacy and research in advancing safer nicotine availability in low- and middle-income countries. He authors articles in the harm reduction magazine, Filter.