1. Institute of Dermatology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China;
2. Department of Nutrition and Food Hygiene, School of Public Health, Anhui Medical University, Hefei, Anhui Province, China;
3. Department of Occupational Health and Environmental Health, School of Public Health, Anhui Medical University, Hefei, Anhui Province, China