RT Journal Article SR Electronic T1 Incidental, delayed diagnosis of gastric foreign body in a 15-year-old boy JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1568 OP 1569 VO 168 IS 12 A1 Al-Busairi, Waleed A. A1 Ali, Fawzi E. YR 2003 UL http://www.cmaj.ca/content/168/12/1568.abstract