Salazar-Ospina, A., Benjumea G., D.M. and Amariles M., P. 2012. Problems of process and problems of outcome regarding drugs: historical evolution of their definitions. Revista Facultad Nacional de Salud Pública. 29, 3 (Jan. 2012), 329–340. DOI:https://doi.org/10.17533/udea.rfnsp.9494.