TY - Journal of Otolaryngology and Ophthalmology of Shandong University A1 - ZHANG Hua,ZONG Shu,ZHANG Qing-quan T1 - Y1 - 2006-12-24 JF - Journal of Otolaryngology and Ophthalmology of Shandong University JO - Journal of Otolaryngology and Ophthalmology of Shandong University SP - 569 EP - 572 VL - 20 IS - 6 UR - http://ebhyxbwk.njournal.sdu.edu.cn N1 - ER -