Midwest Clinical Research Center, Dayton, Ohio, United States
IPS Research Company, Oklahoma City, Oklahoma, United States
Oregon Center for Clinical Research, Inc., Eugene, Oregon, United States
Princeton Medical Institute, Princeton, New Jersey, United States
Pharmasite Research, Inc., Baltimore, Maryland, United States
Southwestern Research Institute, Burbank, California, United States
Wallace Rheumatic Study Center, Los Angeles, California, United States
Radiant Research, Inc., West Palm Beach, Florida, United States
C.A.R.E. Center, Raleigh, North Carolina, United States
London Health Sciences Centre, Victoria Campus, London, Ontario, Canada
Clinical Research Group of St. Petersburg, St. Petersburg, Florida, United States
The Center for Sleep and Wake Disorders/Midwest Neurology, Danville, Indiana, United States
Clinical Research Group of St. Petersburg, Inc., St. Petersburg, Florida, United States
Psychiatrische Universitatsklinik, Regensburg, Germany