1. Shanghai Institute of Dermatology, Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
2. Institute of Dermatology, Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei, Anhui, China
3. Department of Dermatology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland