- University of Parma and Azienda Ospedaliera Universitaria of Parma
External person
- United Laboratories of Tartu University Clinics
- Estonian Headache Society
External person
- Universität Duisburg-Essen
External person
- Universitair Ziekenhuis Brussel
External person
- Ghent University Hospital
External person
- Medical University of Innsbruck
External person
- University of Modena and Reggio Emilia
External person
- Universite de Liege
- Instituto Investigación Médica Mercedes y Martín Ferreyra-INIMEC-CONICET-Universidad Nacional Córdoba
- Conci·Carpinella Institute
External person