The authors regret the inclusion of two errors in the above article.
The name of the author was given as Azadeh Solatnifar. The correct spelling of the author’s name is Azadeh Soltanifar.
The affiliation of Azadeh Soltanifar was originally given as Western University Department of Epidemiology and Biostatistics, Canada.
The correct affiliation for Azadeh Soltanifar is Department of Community Medicine, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
The article has been corrected.