A multicentre cluster-randomized clinical trial to improve antibiotic use and reduce length of stay in hospitals: comparison of three measurement and feedback methods. - Kallen, M C; Hulscher, M E J L; Elzer, B; Geerlings, S E; Linden, P D van der; Teerenstra, S; Natsch, S; Opmeer, B C; Prins, J M; Group, The Impact Study; van der Linden, P D; Leendertse, M; et al. (Journal of Antimicrobial Chemotherapy (JAC), 2021)