1. Department of Occupational Health and Environment Health, School of Public Health, Anhui Medical University, Hefei, Anhui, PR China
2. Ministry of Education, Key Laboratory of Dermatology, Anhui Medical University, Hefei, Anhui, China
3. Shenzhen Prevention and Treatment Center for Occupational Disease, Shenzhen, Guangdong, PR China
4. Department of Dermatology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, PR China