1. Department of Neurology, Charité Universitätsmedizin Berlin, Berlin, Germany
2. Universitätsmedizin Greifswald, Greifswald, Germany
3. Novartis Pharma GmbH, Nuremberg, Germany
4. Praxis Gendolla, Essen, Germany
5. The Kiel Migraine and Headache Centre, Kiel, Germany
6. Novartis Pharma AG, Basel, Switzerland
7. Novartis AG, New York, NY, USA