Acknowledgments
We thank from Golestan, Bushehr, Birjand, Kurdistan and Yazd Universities of medical Sciences for their cooperation for this study and also study cooperative executive committee, including: Abbas Najari, MD (Centre for Collective Refection & Implementation of Ideas, Undersecretary for Research and Technology, Ministry of Health and Medical Education, Tehran, Iran); Abdolmohhamad Khajeian, MD (Deputy of Health, Bushehr University of Medical Sciences, Bushehr, Iran); Azita Anaraki, MD (Population, family and school health Department, Bushehr University of Medical Sciences, Bushehr, Iran); Fariba Ghazaghi, MSc (Population, family and school health Department, Birjand University of Medical Sciences, Birjand, Iran); Forouzan Lahouni, MS (Population, family and school health Group, Kurdistan University of Medical Sciences, Sanandaj, Iran); Forouzandeh Kalantari, MD (Population, family and school health Department, Yazd University of Medical Sciences, Yazd, Iran); Hossein Fallah, MSc (Nutrition Department, Ministry of Health and Medical Education, Tehran, Iran); Khadije Kordi, MD (Population, family and school health Department, Golestan University of Medical Sciences, Gorgan, Iran); Lotfollah Saed, MD (Department of Internal Medicine, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran); Shabahang Amirshekari, MSc (Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran); Mahsa Norooozzadeh, MSc (Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran); Maryam Farahmand, PhD (Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran); Marzieh Rostami Dovom, PhD (Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran); Mehdi Hedayati, PhD (Cellular and Molecular Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran); Mehdi Mehdizade, MD (Deputy of Health, Birjand university of Medical science, Birjand, Iran); Mohammad Hassan Lotf, MD (Deputy of health, Kurdistan University of Medical Sciences, Sanandaj, Iran); Mohammad-Esmaeil Motlagh, MD (Department of Pediatrics, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran); Mozhgan Bashghareh, MSc (Population, family and school health Department, Golestan University of Medical Sciences, Gorgan, Iran); Nosrat Zamanipour, MSc (Population, family and school health Department, Birjand University of Medical Sciences, Birjand, Iran); Parvin Mirmiran, PhD (Nutrition and Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran); Saeid Sadeghian Sharif, PhD (Faculty of nutrition Science and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran Iran); Saeid Shahraz, PhD (Heller School of Social Policy and Management, Brandeis University, Waltham, Massachusetts, USA); Samareh Khari, MD (Population, family and school health Department, Golestan University of Medical Sciences, Gorgan, Iran); Sedigheh Alishahi, MSc (Population, family and school health Department, Yazd University of Medical Sciences, Yazd, Iran); Shole Shahgheibi, MD (Department of Obstetrics and Gynecology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran); Sima Nazarpour, PhD (Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran); Yadollah Mehrabi, PhD (Department of Epidemiology, School of Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran); Zahra Ghaedmohammadi, MSc (Population, family and school health Department, Bushehr University of Medical Sciences, Bushehr, Iran).