University Hospital Ghent, Gent, Belgium
Charité Research Organisation GmbH, Berlin, Germany
Noble Clinical Research, Tucson, Arizona, United States
Preferred Research Partners, Inc, Little Rock, Arkansas, United States
Core Healthcare Group, Cerritos, California, United States
QPS Netherlands B.V., Groningen, Netherlands
Altasciences Company Inc., Montreal, Canada
Altasciences Clinical Kansas, Inc. (former Vince and Associates Clinical Research, Inc.), Overland Park, Kansas, United States
framol-med GmbH, Lungenpraxis, Rheinau, Germany
Advanced Sleep Research, Berlin, Germany
ZMS, Warendorf, Germany
Centre For Human Drug Research, Leiden, Netherlands
QPS Netherlands B.V., Groningen, Netherlands
Klinikum der Stadt Ludwigshafen am Rhein gGmbH, Ludwigshafen, Germany
Universitäts-Herzzentrum Bad Krozingen, Bad Krozingen, Germany
Universitäts-Herzzentrum Freiburg, Freiburg, Germany
Anaheim Clinical Trials, Anaheim, California, United States
University of Illinois - Department of Neurosurgery, Chicago, Illinois, United States
University Hospitals Case Medical Center - Department of Neurosurgery, Cleveland, Ohio, United States
Debreceni Egyetem, Idegsebészet, Debrecen, Hungary