1. European Centre for Disease Prevention and Control/WHO Regional Office for Europe. HIV/AIDS surveillance in Europe 2014. Stockholm: European Centre for Disease Prevention and Control; November 2015 (www.euro.who.int).
2. Surveillance of human immunodeficiency virus suggests that younger men who have sex with men are at higher risk of infection, European Union, 2003–2012;Janiec;Euro Surveill,2013
3. The European Men-Who-Have-Sex-With-Men Internet Survey (EMIS) Network. EMIS 2010: The European MenWho-Have-Sex-With-Men Internet Survey. Findings from 38 countries. Stockholm: European Centre for Disease Prevention and Control; 2013 (http://ecdc.europa.eu/en/publications/Publications/EMIS-2010-european-men-who-have-sex-with-men-survey.pdf).
4. Sexual health, HIV, and sexually transmitted infections among gay, bisexual, and other men who have sex with men in the United States;Wolitski;AIDS Behav,2011
5. HIV–HCV co-infection: epidemiology, pathogenesis and therapeutic implications;Andreoni;Eur Rev Med Pharmacol Sci,2012