Radboud University Medical Center, Nijmegen, Netherlands
Maastricht University Medical Center, Maastricht, Netherlands
Erasmus Medical Center, Rotterdam, Netherlands
University of Pittsburgh, Pittsburgh, Pennsylvania, United States
Wayne State University, Detroit, Michigan, United States
University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States
University of California San Diego, San Diego, California, United States
Wayne State University - Detroit Receiving Hospital, Detroit, Michigan, United States
Baylor College of Medicine/Ben Taub General Hospital, Houston, Texas, United States
University of Florida, Gainesville, Florida, United States
Dekalb Medical Center, Decatur, Georgia, United States
New England Center for Clinical Research, Fall River, Massachusetts, United States
Shands at University Florida Gainesville, Gainesville, Florida, United States
Wayne State University, Detroit, Michigan, United States
University of Florida, Gainesville, Florida, United States
Hartford Hospital, Hartford, Connecticut, United States
Tallahassee Neurological Clinic, Tallahassee, Florida, United States
Baylor College of Medicine/Ben Taub General Hospital, Houston, Texas, United States
Dekalb Medical Center, Decatur, Georgia, United States
Wayne State University, Detroit, Michigan, United States
University of Pecs, Pecs, Hungary