Hailer, Y. D., Montgomery, S., Ekbom, A., Nilsson, O., & Bahmanyar, S. (2012). Legg-Calvé-Perthes disease and the risk of injuries requiring hospitalization. Acta Orthopaedica, 83(6), 572–576. https://doi.org/10.3109/17453674.2012.736167