Glossopharyngeal Nerve Block versus Lidocaine Spray to Improve Tolerance in Upper Gastrointestinal Endoscopy.
Ortega Ramírez M, Linares Segovia B, García Cuevas MA, Sánchez Romero JL, Botello Buenrostro I, Amador Licona N, Guízar Mendoza JM, Guerrero Romero JF, Vázquez Zárate VM. Gastroenterol Res Pract. 2013; 2013:264509. Epub 2013 Mar 5.