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Thierfelder, C; Weber, R; Elzi, L; Furrer, H; Cavassini, M; Calmy, A; Bernasconi, E; Gutmann, C; Ledergerber, B; Swiss HIV Cohort Study Group, (2012). Participation, characteristics and retention rates of HIV-positive immigrants in the Swiss HIV Cohort Study. HIV medicine, 13(2), pp. 118-26. Oxford: Blackwell Science 10.1111/j.1468-1293.2011.00949.x
