1 Department of Dermatology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.
2 Department of Gastroenterology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.
3 Department of Dermatology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China; Department of Dermatology, Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
4 Departments of Dermatology, Venereology, Allergology and Immunology, Dessau Medical Center, Faculty of Health Sciences Brandenburg, Brandenburg Medical School Theodor Fontane, Dessau, Germany.
5 Department of Dermatology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China. Electronic address: ymfan1963@163.com.