Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran. Rasool Akram Hospital, Iran University of Medical Sciences, Tehran, Iran. Department of Biostatistics, School of Public Health, Iran University of Medical Sciences, Tehran, Iran. Yazd Cardiovascular Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. Student Research Committee, Department of Clinical Nutrition and Dietetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran.