ystematic review and meta-analysis
http://orcid.org/0000-0003-4231-3147Ahmad Jayedi1, 
Mahdieh-Sadat Zargar2, Alireza Emadi3, http://orcid.org/0000-0002-4533-1722Dagfinn Aune4,5,6 
Correspondence to Dr Ahmad Jayedi, Social Determinants of Health Research Center, Semnan University of Medical Sciences, Semnan, Iran; ahmadjayedi@yahoo.com