Non-clinical sexual health support for HIV, viral hepatitis, and other sexually transmitted infections in gay, bisexual and other men who have sex with men: Protocol for a European Community Health Worker Online Survey (ECHOES)

Nigel Sherriff, Jörg Huber, Nick McGlynn, Carrie Llewellyn, Alex Pollard, Nicolas Lorente, Cinta Folch, Caiohme Cawley, Oksana Panochenko, Michael Krone, Maria Dutarte, Jordi Casabona