1. Division of Rheumatology, Guang An Men Hospital, China Academy of Chinese Medical Science, Beijing 100053, P.R.�China
2. Department of Dermatology, The First People's Hospital of Jingmen, Jingmen, Hubei 448000, P.R.�China
3. Department of Dermatology, The First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, Guangzhou, Guangdong 510000, P.R.�China