2Zaytoun G M, Rouadi P W, Baki D H. Endoscopic management of foreign bodies in the tracheobronchieal tree: Predictive factors for complications. Otolaryngol Head Neck Surg, 2000,123:311-316.
3Goldernberg D, Ari E G, Golz A, et al. Tracheotomy complications: A retrospective study of 1130 cases. Otolaryngol Head Neck Surg, 2000,123:495-500.