4Catherine A. Young, Christine O. Menias, Sanjeev Bhalla, and- Srinivasa R. Prasad,. CT Features of Esophageal Emergencies. Ra- diographics [ J ] ,2008,28 (6) : 1541 - 1553.
5Chiu CY, Wong KS, Tsai MH. Massive aspiration of barium sulfateduring an upper gastrointestinal examination in a child with dysphagia[J]. IntJ Pediatr Otorhinolaryngol,2005 ,69(4) :541-544.
