KHODADOST M, MAAJANI K, ABBASI-GHAHRAMANLOO A, NASERBAKHT M, GHODUSI E, SARVI F, MOHAMMADZADEH A, MOTEVALIAN SA, HAJEBI A. Prevalence of Hookah Smoking among University Students in Iran: A Meta-Analysis of Observational Studies. Iran J Public Health. 2020;49(1):1-13.