PEREZ-RIVEROS, Erika D. et al. Non-inferiority between two low-volume agents (sodium picosulfate/magnesium citrate vs. sodium sulfate/potassium/magnesium) to prepare the bowel for diagnostic procedures: an observational study. Rev. colomb. Gastroenterol. [online]. 2020, vol.35, n.4, pp.436-446.  Epub 12-Jul-2021. ISSN 0120-9957.