[Demographic profile of men who have sex with men who seek for sex mostly on internet].
Li
Xiu-Fang
XF
The Sex Health Center of the Affiliated Hospital of Medical College, Qingdao University, Qingdao 266003, China.
Zhang
Bei-Chuan
BC
Chu
Quan-Sheng
QS
D003710:Demography; D018451:Homosexuality, Male / Q000523:psychology* / Q000706:statistics & numerical data; D006801:Humans; D020407:Internet; D008297:Male; D011795:Surveys and Questionnaires