TY - GEN AU - Marcus,Ulrich AU - Schmidt,Axel J AU - Hamouda,Osamah AU - Bochow,Michael TI - Estimating the regional distribution of men who have sex with men (MSM) based on Internet surveys SN - 1471-2458 PY - 2009///0921 KW - Adult KW - Cluster Analysis KW - Germany KW - epidemiology KW - HIV Seropositivity KW - Health Knowledge, Attitudes, Practice KW - Homosexuality, Male KW - statistics & numerical data KW - Humans KW - Internet KW - Male KW - Middle Aged KW - Population Surveillance KW - methods KW - Self Disclosure KW - Sexual Partners KW - Sexually Transmitted Diseases KW - Young Adult N1 - Publication Type: Journal Article; Research Support, Non-U.S. Gov't UR - https://doi.org/10.1186/1471-2458-9-180 ER -