PPD Dental Pain Clinic, Austin, Texas, United States
Walter Reed National Military Medical Center, Bethesda, Maryland, United States
Univeristy of Missouri, Columbia, Missouri, United States
Walter Reed National Military Medical Center, Bethesda, Maryland, United States
Worldwide Clinical Trials, San Antonio, Texas, United States
CEDRA Clinical Research, Austin, Texas, United States
North Florida / South Georgia Veterans Administration Hospital, Gainesville, Florida, United States