1 Department of Sexually Transmitted Disease, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, China.
2 Department of Pathology, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, China.
3 Department of Sexually Transmitted Disease, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, China. Electronic address: md_longfuquan@163.com.