1. Department of Occupational Health and Environment Health, School of Public Health; Anhui Medical University; Hefei Anhui China
2. Anhui NO.2 Province People's Hospital; Hefei Anhui China
3. Institute of Dermatology; Anhui Medical University; 81 Meishan Road Hefei Anhui China
4. Faculty of Health and Medical Sciences; University of Surrey; Guildford UK