Vestergaad, V. et al. 2019. 20-year trends of distal femoral, patellar, and proximal tibial fractures: a Danish nationwide cohort study of 60,823 patients. Acta Orthopaedica. 91, 1 (Dec. 2019), 109–114. DOI:https://doi.org/10.1080/17453674.2019.1698148.