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Frey, Kathrin; Lociciro, Stéphanie; Blank, Patricia; Schwenkglenks, Matthias; Dubois-Arber, Françoise; Rosenbrock, Rolf; Lehner, Andreas; Staub, Roger; Derendinger, Steven; Schmidt, Axel; Bize, Raphael; Kübler, Daniel; Low, Nicola (2020). 'Break the Chains 2015' community-based HIV prevention campaign for men who have sex with men in Switzerland: non-randomised evaluation and cost analysis. BMJ open, 10(1), e032459. BMJ Publishing Group 10.1136/bmjopen-2019-032459
