Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 43 3 2014 03 15 383 4 Kalaivani Annadurai Dept. of Community Medicine, Shri Sathya Sai Medical College & Research Institute , Thiruporur, India. Raja Danasekaran Dept. of Community Medicine, Shri Sathya Sai Medical College & Research Institute , Thiruporur, India. Geetha Mani Dept. of Community Medicine, Shri Sathya Sai Medical College & Research Institute , Thiruporur, India. Jegadeesh Rama-Samy Dept. of Community Medicine, Shri Sathya Sai Medical College & Research Institute , Thiruporur, India. 2015 10 15 - https://ijph.tums.ac.ir/index.php/ijph/article/view/4168 https://ijph.tums.ac.ir/index.php/ijph/article/download/4168/3825