Ferreyra, A., Olleac, R. and Masquijo, J.J. 2021. Intraoperative Measurement With a Smartphone App That Improves the Accuracy of Derotational Osteotomies. Revista de la Asociación Argentina de Ortopedia y Traumatología. 86, 6 (Dec. 2021), 858-861. DOI:https://doi.org/10.15417/issn.1852-7434.2021.86.6.1283.