1. Department of Endocrinology, Affiliated Hospital of Chengde Medical University, Chengde, Hebei 067000, P.R. China
2. Department of Respiratory, Affiliated Hospital of Chengde Medical University, Chengde, Hebei 067000, P.R. China
3. Department of Dermatology, Affiliated Hospital of Chengde Medical University, Chengde, Hebei 067000, P.R. China