1. Department of Otorhinolaryngology, Hebei Medical University, Shijiazhuang, Hebei, China (mainland)
2. Department of Otorhinolaryngology, Bethune International Peace Hospital, Shijiazhuang, Hebei, China (mainland)
3. Department of Pathobiology and Immunology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China (mainland)