Factors related to condomless anal intercourse between men who have sex with men: results from a European bio-behavioural survey
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M. Rosińska | S. Dias | N. Sherriff | C. Llewellyn | A. Rafila | D. Staneková | B. Suligoi | S. Čaplinskas | C. Nöstlinger | I. Klavs | I. Veličko | C. Folch | I. Toskin | I. Alexiev | M. Mirandola | L. Gios | S. Kühlmann-Berenzon | U. Marcus | A. M. Jones | N S Sherriff | U Marcus | Ulrich Marcus | Nigel Sherriff