AUTHOR CONTRIBUTIONS
Afsane Bahrami conducted all analyses and drafted the manuscript. Amir Talebpour and Mahtab Mohammadifard coordinated the fieldwork of the study. Reza Zare Feyzabadi, Mahboube Tajik, Sara Mahmoudzadeh, Mansoore Saharkhiz and Hadis Rezapour provided methodological feedback. Afsane Bahrami and Gordon A. Ferns supervised the overall research project and helped to draft the manuscript. All of the authors have read and confirmed the final manuscript. All authors state that they have no conflicts of interest.