2[1]Mason SM. Pharyngeal coin removal in children[J].J Accid Emerg Med,1997,14(3):175-6
3[2]Kelley JE,Leech MH,Carr MG.A safe and cost-effective protocol for the management of esophageal coins in children[J].J Pediatr Surg,1993,28(7): 898-900
4[3]Macpherson RI, Hill JG, Otherson HB, et al. Esophageal foreign bod ies in children:Diagnosis, treatment,and complications[J].Am J Roentgeno l,1996,166(4):919-24
5[4]Conners GP. A literature-based comparison of three methods of ped iatric esophageal coin removal[J]. Pediatr Emerg Care,1997,13(2):154-7
6[5]Mason SM.Pharyngeal coin removal in children[J].J Accid Emerg M ed,1997,14(3):175-6
