1. Rhinology Unit and Smell Clinic, ENT Department, Hospital Clínic, Barcelona, Catalonia, Spain.
2. Clinical and Experimental Respiratory Immunoallergy (IRCE), August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Catalonia, Spain.
3. Neuroradiology Unit, Department of Radiology and Imaging Diagnostic Center, Hospital Clínic, Barcelona, Catalonia, Spain.
4. Brain Injury Unit, Guttmann Institute Foundation and Neurorehabilitation Hospital, Autonomous University of Barcelona, Barcelona, Catalonia, Spain.
5. Germans Trias i Pujol Science Health Institute Foundation, Barcelona, Catalonia, Spain.
6. Center for Biomedical Research Network in Respiratory Diseases (CIBERES), Barcelona, Catalonia, Spain.
7. Barcelona Institute of Global Health, Hospital Clínic - University of Barcelona, Barcelona, Catalonia, Spain.