The way the animal toxicology studies were designed with the relatively short (90 d) exposure period and follow-up after the end of the exposure (42 d) also raises concerns

Expanding Evidence Base: The Impact of Tobacco 21 Policies on Youth Tobacco Use More details Hide details 1 Department of Population and Public Health Sciences, Keck School of Medicine, University of Southern California, Los Angeles, United States 2 Crown Family School of Social Work, Policy, and Practice, The University of Chicago, Chicago, United States 3 Nottingham Centre for Public Health and Epidemiology, School of Medicine, Nottingham City Hospital, University of Nottingham, Nottingham, United Kingdom 4 Department of Psychology, University of Southern California, Los Angeles, United States 5 Suzanne Dworak-Peck School of Social Work, University of Southern California, Los Angeles, United States Submission date: 2025-11-07 Final revision date: 2025-11-19 Acceptance date: 2025-11-22 Publication date: 2026-02-12 Corresponding author Danyi Li Department of Population and Public Health Sciences, Keck School of Medicine, University of Southern California, Los Angeles, California, 90032, United States Tob

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Both interviewers (KP, MGH) were graduate students trained in qualitative interviewing techniques