Díaz Herrera, W., Osorio Zambrano, H.F. and Sandoval Cabrera, M.F. 2016. Nasogastric tube insertion using esophageal guide in anesthetized patients at University Hospital in Neiva. RFS Revista Facultad de Salud. 8, 2 (Jul. 2016), 21–25. DOI:https://doi.org/10.25054/rfs.v8i2.1806.