1. Division of Infectious Diseases and Hospital Epidemiology and
2. Children’s Research Center, University Children’s Hospital of Zurich, Zurich, Switzerland;
3. Viral Immunobiology, Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland;
4. Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan;
5. Center for Infectious Medicine, Department of Medicine, Karolinska Institutet, Solna, Sweden;
6. Institute for Cancer Research, Oslo University Hospital, Oslo, Norway;
7. Institute of Clinical Medicine, University of Oslo, Oslo, Norway;
8. Emergency Department and
9. Division of Otolaryngology, University Children’s Hospital of Zurich, Zurich, Switzerland; and
10. Institute of Surgical Pathology, University Hospital Zurich, University of Zurich, Zurich, Switzerland