Kiapekos, N., Broström, E., Hägglund, G., & Åstrand, P. (2019). Primary surgery to prevent hip dislocation in children with cerebral palsy in Sweden: a minimum 5-year follow-up by the national surveillance program (CPUP). Acta Orthopaedica, 90(5), 495–500. https://doi.org/10.1080/17453674.2019.1627116