Universita Federico II di Napoli, Napoli, Italy
University Hospital Bern, Bern, Switzerland
Ospedale Sant' Anna Di Como, San Fermo della Battaglia, Italy
Piedmont Heart Institute, Atlanta, Georgia, United States
INSELSPITAL - Universitätsspital Bern, Bern, Switzerland
Helios Klinikum Siegburg, Siegburg, Germany
University Hospital of Lund, Lund, Sweden
Coastal Pain Spinal Diagnostic, Carlsbad, California, United States
Illinois Lung and Critical Care Institute, Peoria, Illinois, United States
New York Presbyterian Columbia University Medical Center, New York, New York, United States
Franciscan Research Center, Tacoma, Washington, United States
Clearwater Cardiovascular Consultants, Clearwater, Florida, United States
Little Company of Mary Hospital, Torrance, California, United States
First Coast Cardiovascular, Jacksonville, Florida, United States
Community Heart and Vascular Hospital, Indianapolis, Indiana, United States
North Memorial Medical Center, Minneapolis, Minnesota, United States
IU Health North Medical Center, Carmel, Indiana, United States
Millennium Pain Center, Bloomington, Illinois, United States
Neurovations, Napa, California, United States
UCSD Medical Center - Jacobs Medical Center, La Jolla, California, United States
CHU Nancy, Vandoeuvre-les-Nancy, France
LUMC, Leiden, Netherlands
MUMC, Maastricht, Netherlands
Hunter Pain Clinic, Newcastle, New South Wales, Australia