M&M Clinical Trials Inc. (Centrexion)

University of California Davis (Centrexion)

University of Pittsburgh (Centrexion)

University of Texas Southwestern Medical Center/Parkland Memorial Hospital (Centrexion)

Montefiore Medical Center (Centrexion)

University of Rochester Translational Pain Research Program (Centrexion)

Icahn School of Medicine at Mount Sinai (Centrexion)

University of Washington (Centrexion)

University of Florida (Centrexion)

University of Pennsylvania (Centrexion)