1. Department of Otorhinolaryngology, Affiliated Hospital of Weifang Medical University, Weifang, Shandong 261031, P.R. China
2. Department of Plastic Surgery, Plastic Surgery Hospital of Weifang Medical University, Weifang, Shandong 261041, P.R. China
3. Department of Vascular Interventional Radiology, Affiliated Hospital of Weifang Medical University, Weifang, Shandong 261031, P.R. China