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Hachfeld, Anna; Atkinson, Andrew; Calmy, Alexandra; Tejada, Begoña Martinez; Hasse, Barbara; Paioni, Paolo; Kahlert, Christian R.; Boillat‐Blanco, Noémie; Stoeckle, Marcel; Aebi-Popp, Karoline (2022). Decrease of condom use in heterosexual couples and its impact on pregnancy rates: the Swiss HIV Cohort Study (SHCS). HIV medicine, 23(1), pp. 60-69. Wiley 10.1111/hiv.13152