[1] Ctr Pain Relief Inc, 400 Court St,Ste 100, Charleston, WV 25301 USA
[2] Mayo Clin, Rochester, MN USA
[3] Summit Pain Alliance, Santa Rosa, CA USA
[4] St Lukes Univ Hlth Network, Bethlehem, PA USA
[5] Pain Diagnost & Intervent Care, Sewickley, PA USA
[6] Univ Illinois, Dept Neurosurg, Chicago, IL USA
[7] Florida Pain Melbourne Clin, Melbourne, FL USA
[8] Beth Israel Deaconess Med Ctr, Dept Neurosurg, Boston, MA 02215 USA
[9] Northwestern Univ, Feinberg Sch Med, Chicago, IL 60611 USA
[10] Johns Hopkins Sch Med, Anesthesiol & Crit Care Med, Baltimore, MD USA
[11] Holy Cross Hosp, Ft Lauderdale, FL USA
[12] Summa Western Reserve Hosp, Cuyahoga Falls, OH USA
[13] James Cook Univ Hosp, Middlesbrough, Cleveland, England
[14] Duke Univ, Med Ctr, Div Neurosurg, Durham, NC 27710 USA
[15] Hosp Gen Univ, Valencia Sch Med, Valencia, Spain
[16] EHC Hosptial, Anaesthesia & Pain Management Dept, Morges, Switzerland
[17] CHUV Univ Hosp, Lausanne, Switzerland
[18] CHU Poitiers, Serv Neurochirurg, Poitiers, France
[19] Marcus Neurosci Inst, Boca Raton, FL USA
[20] Univ Wales Hosp, Dept Neurosurg, Cardiff, S Glam, Wales
[21] Cleveland Clin, Cleveland, OH 44106 USA