2Kiyan G, Gocmen B, Tugtepe H, et al. Foreign body aspiration in children :the value of diagnostic criteria[J]. Int J Pediatr Otorhi- nolaryngol, 2009,73 (7) : 963-967.
9Pinto A, Scaglione M, Pinto F, et al. Tracheobronchial aspiration of foreign bodies : current indications for emergency plain chest radiography[J]. Radiol Med, 2006,111 (4) :497-506.
