mohammad reza malekahmadi assistant professor, department pediatrics, school of medicine, shahrekord university of medical sciences, shahrekord, iran babak moazen universal network for health information dissemination and exchange (unhide) abolfazl khoshdel assistant professor, department pediatrics, school of medicine, shahrekord university of medical sciences, shahrekord, iran fereshteh rahimzadeh kashan university of medical sciences, kashan, iran maryam moghani lankarani medicine and health promotion institute, tehran, iran shervin assari department of health behavior and health education, school of public health, university of michigan, michigan, united states