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Hasse, Barbara; Ledergerber, Bruno; Hirschel, Bernard; Vernazza, Pietro; Glass, Tracy R; Jeannin, Andre; Evison, John-Marc; Elzi, Luigia; Cavassini, Matthias; Bernasconi, Enos; Nicca, Dunja; Weber, Rainer; Swiss HIV Cohort, Study (2010). Frequency and determinants of unprotected sex among HIV-infected persons: the Swiss HIV cohort study. Clinical infectious diseases, 51(11), pp. 1314-22. Cary, N.C.: The University of Chicago Press 10.1086/656809
