1[1]House JW, Brackmann DE. Facial nervegrading system [J].Otolaryngol Head Neck Surg, 1985; 93: 146.
2[2]Koos WT. Criteria for preservation of vestibulocohlear nerve function during microsurgical remove of acoustic neuromas[J]. Acta Neurochir(Wein), 1988; 92: 55-66.