[1] Chinese Acad Med Sci, Peking Union Med Coll, Inst Dermatol, Nanjing, Jiangsu, Peoples R China
[2] Chinese Acad Med Sci, Peking Union Med Coll, Canc Inst Hosp, Beijing 100730, Peoples R China
[3] China CDC, Natl Ctr STD Control, Nanjing, Jiangsu, Peoples R China
[4] Capital Med Univ, Beijing You An Hosp, Beijing, Peoples R China
[5] Univ Calif Los Angeles, Los Angeles, CA USA
[6] Vanderbilt Univ, Sch Med, Nashville, TN 37212 USA