Y Qiu1, Y Tang2, J Zhang2, X Yi3, X Zhong2, G Liu2, H Xu2, Y Lei2. 1. Department of Integrated Medicine, the Affiliated Tumor Hospital of Guangxi Medical University, Nanning, Guangxi, China. 2. Department of Respiratory Medicine, the First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China. 3. Department of Otolaryngology Head and Neck Surgery, the First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China.