David Borsook, MD, PhDDirector, Pain & Analgesia Imaging Neuroscience (P.A.I.N.) Group McLean Hospital, Masschusetts General Hospital, and Children's HospitalBelmont, MAArne May, MD, PhDInstitut für Systemische NeurowissenschaftenZentrum für Experimentelle MedizinUniversitätsklinikum Hamburg-EppendorfHamburg, GermanyPeter Goadsby, MD, PhDDirector, UCSF Headache CenterDepartment of NeurologyUniversity of California, San FranciscoSan Francisco, CARichard Hargreaves, PhDVice PresidentWorldwide Discovery HeadNeuroscienceMerck Research LaboratoriesWest Point PA and Kenilworth, NJ