9Goldenberg D, Ari EG, Golz A, Danino J,et al. Tracheotomy complications: a retrospective study of 1130 cases. Otolaryngol Head Neck Surg ,2000,123(4):495-500.
10Cotton RT. Diagnosis and management of pediatric laryngotracheal reconstruction. Laryngoscope, 1989,99: 1111.