[1] Charles Univ Prague, Fac Med 1, Ctr Tobacco Dependent, Med Dept 3, Prague, Czech Republic
[2] Gen Univ Hosp, Prague, Czech Republic
[3] Charles Univ Prague, Inst Hyg & Epidemiol, Fac Med 1, Prague, Czech Republic
[4] Mayo Clin, Sch Grad Med Educ, Coll Med & Sci, Dept Psychiat & Psychol, Rochester, MN USA
[5] Mayo Clin, Dept Psychiat & Psychol, Rochester, MN USA
[6] Mayo Clin, Div Endocrinol Diabet Metab & Nutr, Rochester, MN USA
[7] Mayo Clin, Div Clin Trials & Biostat, Rochester, MN USA
[8] Mayo Clin, Nicotine Dependence Ctr, Div Gen Internal Med, Rochester, MN 55905 USA
[9] Mayo Clin, Div Epidemiol, Rochester, MN 55905 USA
[10] Mayo Clin, Dept Med Res Hub, Rochester, MN 55905 USA