3Eisen GM, Baron TH, Dominitz JA, et al. Guideline for the management of ingested foreign bodies. Gastrointest Endosc,2002,55: 802 -806.
4Shivakumar AM, Naik AS, Prashanth KB, et al. Foreign body in upper digstive tract. Indian J Pediatri,2004,71:689-693.
5Little DC, Shah SR, St Peter SD,et al. Esophageal foreign bodies in the pediatric population: our first 500 cases. J Pediatr Surg, 2006,41:914-918.
6Webb WA. Management of foreign bodies of the upper gastrointestinal tract : update. Gastrointest Endosc, 1995,41 : 39-51.
7Li ZS, Sun ZX, Zou DW,et al. Endoscopic management of foreign bodies in the upper-GI tract: experience with 1088 cases in China. Gastrointest Endosc ,2006,64:485-492.
8Mosca S, Manes G, Martino R, et al. Endoscopic management of foreign bodies in the upper gastrointestinal tract: report on a series of 414 adult patients. Endosc,2001,33 :692-696.
9Weiland ST, Schurr MJ. Conservative management of ingested foreign bodies. J Gastrointest Surg,2002 ,6 :496-500.
10Katsinelos P, Kountouras J, Paroutoglou G,et al. Endoscopic techniques and management of foreign body ingestion and food bolus impaetio.n in the upper gastrointestinal tract : a retrospective analysis of 139 cases. J Clin Gastroenterol,2006 ,40 :784-789.
