Fajardo, R., Valenzuela, J. I., Olaya, S. C., Quintero, G., Carrasquilla, G., Pinzón, C. E., … Ramírez, J. C. (2011). Cost-effectiveness of laparoscopic versus open cholecystectomy. Biomedica, 31(4), 514–24. https://doi.org/10.7705/biomedica.v31i4.405