Ordóñez, Jaime E., and Arlex U. Palacios. 2016. “Cost-Effectiveness Analysis of Apixaban Versus Enoxaparin in Patients Undergoing Total Hip or Knee Replacement in Colombia”. Revista Colombiana De Ortopedia Y Traumatología 30 (4):133-40. https://doi.org/10.1016/j.rccot.2016.11.007.