Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 44 7 2015 10 11 1021 1022 EN Yuee Huang Dept. of Preventive Medicine, School of Public Health, Wannan Medical College, Wuhu 241001, China AND Laboratory for Environment and Health, School of Earth and Environment, Anhui University of Science and Technology, Huainan 231001, China. Tan Xu Dept. of Epidemiology, School of Public Health, Medical College of Soochow University, Suzhou 215123, China AND Dept. of Epidemiology, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112, USA. Wenjie Sun School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, China AND School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112, USA. 2015 10 11 2015 10 11 Letter to the Editor https://ijph.tums.ac.ir/index.php/ijph/article/view/3342 https://ijph.tums.ac.ir/index.php/ijph/article/download/3342/3064