Ramezan-Ali Dyanati-Tilaki1, ZabihollahYousefi1, Jamshid Yazdani-Charati 2, Davoud Belarak3 1Health Sciences Research Center, Department of Environmental Health Engineering, School of Health, Mazandaran University of Medical Sciences, Sari, Iran 2Health Sciences Research Center, Department of Biostatistics, Mazandaran University of Medical Sciences, Sari, Iran 3 Student Research Committee, School of Health, Mazandaran University of Medical Sciences, Sari, Iran
In the article published in volume 23, issue Suppl-2, 2013, the second author’s first name is Zabihollah Yousefi, and third author’s last name is Jamshid Yazdani-Charati, were incorrect which is now corrected.