1. College of Integrated Traditional Chinese and Western Medicine, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, P.R. China
2. Hebei Medical University, Shijiazhuang, Hebei 050017, P.R. China
3. Department of Head and Neck Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang 150081, P.R. China