Stony Brook University Medical Center, Stony Brook, New York, United States
The Cleveland Clinic Foundation, Cleveland, Ohio, United States
Glendale Memorial Hospital and Health Center, Glendale, California, United States
Na Homolce Hospital, Prague, Czechia
Universitätskliniken Düsseldorf, Düsseldorf, Germany
Semmelweis University Heart and Vascular Center, Budapest, Hungary
West Virginia Heart Institute, Morgantown, West Virginia, United States
Hoag Memorial Hospital Presbyterian, Newport Beach, California, United States
Weill Medical College at Cornell University, New York, New York, United States
Loyola University Medical Center, Maywood, Illinois, United States
Academisch Medisch Centrum, Amsterdam, Netherlands
Kingston General Hospital, Kingston, Ontario, Canada
Northside Hospital, Atlanta, Georgia, United States
Cardiology Associates of North Mississippi, Tupelo, Mississippi, United States
Cardiac & Vascular Research Center of Northern Michigan, Petoskey, Michigan, United States
Scottsdale Healthcare, Scottsdale, Arizona, United States
Praxis fur Neurologie, Spezielle Schmerztherapie, Psychotherapie, Essen, Nordrhein-Westfalen, Germany
Migräne and Kopfschmerzklinik Königstein, Königstein, Saksen, Germany
Hospital Universitario, Madrid, Spain
University of Chicago Medical Center, Chicago, Illinois, United States
Ohio State University Medical Center, Columbus, Ohio, United States
University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States
Stony Brook University Medical Center, Stony Brook, New York, United States
Aultman Hospital, Canton, Ohio, United States
Penn Presbyterian Medical Center, Philadelphia, Pennsylvania, United States