Northwestern University, Chicago, Illinois, United States
The Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, United States
Houston Methodist Hospital, Houston, Texas, United States
Madigan Army Medical Center, Tacoma, Washington, United States
Massachusetts General Hospital, Boston, Massachusetts, United States
Surrey Clinical Research Centre, Guildford, Surrey, United Kingdom
Quintiles Drug Research Unit at Guy's Hospital, London, United Kingdom
Mt. Sinai School of Medicine, New York, New York, United States
California Allergy and Asthma, Los Angeles, California, United States
Axis Clinical Trials, Los Angeles, California, United States
West Coast Clinical Trials, Costa Mesa, California, United States