1. Department of Otolaryngology, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia 010110, P.R. China
2. Department of Rheumatology and Immunology, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia 010110, P.R. China
3. Computer Information and Network Management Center, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia 010110, P.R. China