J. M. Nossa, N. Escobar, D. Márquez, E. Leal, F. Cabal, and A. Barreto, “Applying a multidisciplinary program for managing hip fractures in the elderly: incidence of comorbidities and their impact on surgical opportunity”, Rev. Colomb. Ortop. Traumatol., vol. 30, no. 3, pp. 84–89, Nov. 2016.