Site name (and location)	Institutional Review Board providing review and approval of the protocol prior to participant enrollment
Albany Medical Center (New York, NY, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
Bronson Methodist Hospital (Kalamazoo, MI, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
Center for Pain Relief (Charleston, WV, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
Clinical Trials of South Carolina (Charleston, SC, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
Comprehensive Pain & Rehabilitation (Pascagoula, MS, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
Goodman Campbell Brain & Spine (Indianapolis, IN, USA)	St. Vincent Institutional Review Board 8402 Harcourt Road, Suite 120 Indianapolis, IN 46260
Houston Pain Centers (Houston, TX, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
Integrated Pain Management Medical Group, Inc. (Walnut Creek, CA, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
Jackson Pain Center (Jackson, MS, USA)	Baptist Health Systems 1225 North State Street Jackson, MS 39202
Napa Biomedical Services (Napa, CA, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
Ned Camden Kneeland, MD (Kalispell, MT, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
NeuroSpine Institute (Eugene, OR, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
New York Spine & Wellness Center (North Syracuse, NY, USA)	St. Joseph’s Hospital Health Center Research Committee 301 Prospect Avenue Syracuse, NY 13203
Newport Beach Headache and Pain (Mission Viejo, CA, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
Oklahoma Pain Physicians (Oklahoma City, OK, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
St. Luke’s Hospital & Health Network (Bethlehem, PA, USA)	St. Luke’s Hospital & Health Network Institutional Review Board 801 Ostrum Street Bethlehem, PA 18015
The Neuroscience Center (Ocean Springs, MS, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115
Tim Houden, MD (Ogden, UT, USA)	Western Institutional Review Board 1019 39th Avenue SE, Suite 120 Puyallup, WA 98374-2115