1. Department of Neurosurgery, TU Dresden, Dresden, Germany;
2. Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany;
3. Division of Rhinology, Department of Otorhinolaryngology-Head and Neck Surgery, Taipei Veterans General Hospital, Taipei, Taiwan;
4. Institute of Brain Science, National Yang Ming Chiao Tung University, Taipei, Taiwan