Stephen G.Ellis, Cleveland, Ohio, United States
Cleveland Clinic Foundation, Cleveland, Ohio, United States
Maine Medical Center, Portland, Maine, United States
South Carolina Heart Center, Columbia, South Carolina, United States
CHU de Point à pitre, Pointe-a-Pitre, Guadeloupe
Polyclinique Sévigné, Cesson Sevigne, France
CH DAX, DAX, France
New England Regional Headache Center, Worcester, Massachusetts, United States
Thomas Jefferson University - Jefferson Headache, Philadelphia, Pennsylvania, United States
Walton Rehabilitation Hospital, Augusta, Georgia, United States
Providence Hospital, Columbia, South Carolina, United States
Charleston Area Medical Center, Charleston, West Virginia, United States
Cedars Sinai Medical Center, Los Angeles, California, United States
Careggi Hospital, Division of Cardiology, Florence, Italy
Herzzentrum / Klinik für Kardiologie / Robert-Koch-Allee 9, Bad Berka, Germany
Inselspital Bern, Bern, Switzerland
Hopitaux Universitaires de Geneve, Geneve, Switzerland
Medizinische Universitat Innsbruck, Innsbruck, Austria