Mukka, S., Hailer, N.P., Möller, M., Gordon, M., Lazarinis, S., Rogmark, C., Östlund, O., Sköldenberg, O., Wolf, O. and study group, T.D. 2022. Study protocol: The DAICY trial—dual versus single-antibiotic impregnated cement in primary hemiarthroplasty for femoral neck fracture—a register-based cluster-randomized crossover-controlled trial. Acta Orthopaedica. 93, (Oct. 2022), 794–800. DOI:https://doi.org/10.2340/17453674.2022.4819.