Calixto-Aguilar, L.; Gonzales-Carazas, E. F.; Marin Calderón, L.; Vásquez Quiroga, J.; Alva Alva, E.; Bardalez Cruz, P.; Palacios Salas, F. eroral ndoscopic yotomy in a ediatric atient ith efractory chalasia: ase eport and eview of the iterature. Rev Gastroenterol Peru 2021, 41, 37-40.