The Metrohealth System, Cleveland, Ohio, United States
Colorado Pain Care, Denver, Colorado, United States
Western Clinical Research, Placentia, California, United States
Colorado Pain Care, LLC, Denver, Colorado, United States
Holy Cross Hospital, Inc, Fort Lauderdale, Florida, United States
GZA Sint-Augustinus, Wilrijk, Antwerpen, Belgium
AZ Delta, Roeselare, Belgium
AZ Delta, Roeselare, West-Vlaanderen, Belgium
Goodman Campbell Brain and Spine, Indiana University, Indianapolis, Indiana, United States
baylor College of Medicine, Houston, Texas, United States
Prizm Pain Management, Canton, Michigan, United States
USC Spine Center, Keck Hospital of USC, Los Angeles, California, United States
Compass Research, Orlando, Florida, United States
The Center for Clinical Research, Winston-Salem, North Carolina, United States
Amphia Ziekenhuis, Oosterhout, Noord-Brabant, Netherlands