Machado-Alba, J. E., Fernández, A., Castrillón, J. D., Campo, C. F., Echeverri, L. F., Gaviria, A., Londoño, M. J., Ochoa, S. A. and Ruiz, J. O. (2013) “Prescribing patterns and economic costs of proton pump inhibitors in Colombia”, Colombia Medica, 44(1), pp. 13–18. doi: 10.25100/cm.v44i1.1028.