[1] Ctr Pain Relief Inc, 400 Court St,Ste 100, Charleston, WV 25301 USA
[2] Pain Diagnost & Intervent Care, Sewickley, PA USA
[3] Jacksonville Spine Ctr, Jacksonville, FL USA
[4] Summit Pain Alliance, Santa Rosa, CA USA
[5] Basildon & Thurrock Univ Hosp NHS Trust, Pain Management & Neuromodulat Ctr, Basildon, England
[6] Hunter Pain Clin, Broadmeadows, NSW, Australia
[7] Pain Doctor Inc, Phoenix, AZ USA
[8] MossRehab, Elkins Pk, PA USA
[9] Florida Pain, Jupiter, FL USA
[10] Duke Univ, Med Ctr, Div Neurosurg, Durham, NC 27710 USA
[11] Summa Western Reserve Hosp, Cuyahoga Falls, OH USA
[12] St Lukes Univ Hlth Network, Bethlehem, PA USA
[13] Marcus Neurosci Inst, Boca Raton, FL USA
[14] Leeds Teaching Hosp, NHS Trust, Leeds, W Yorkshire, England
[15] Florida Pain Melbourne Clin, Melbourne, FL USA
[16] Rutgers Robert Wood Johnson Med Sch, New Brunswick, NJ USA
[17] Cardinal Hill Pain Inst, Lexington, KY USA
[18] Univ Wales Hosp, Dept Neurosurg, Cardiff, S Glam, Wales
[19] Pacific Pain Treatment Ctr, San Francisco, CA USA
[20] Cleveland Clin, Cleveland, OH 44106 USA