[1] Ctr Pain Relief, Charleston, WV USA
[2] Summit Pain Alliance, Santa Rosa, CA USA
[3] Case Western Reserve Univ, Univ Hosp, Cleveland Med Ctr, Cleveland, OH 44106 USA
[4] Mayo Clin, Rochester, MN USA
[5] Case Western Reserve Univ, Vet Adm Med Ctr, Cleveland, OH 44106 USA
[6] Johns Hopkins Univ, Sch Med, Anesthesiol & Crit Care Med, Baltimore, MD USA
[7] Univ Calif San Diego, Dept Anesthesia, San Diego, CA USA
[8] Univ Kentucky, Coll Med, UK HealthCare Pain Serv, Lexington, KY USA
[9] Marcus Neurosci Inst, Boca Raton, FL USA
[10] CRPS, UCLA Med Plaza, Los Angeles, CA USA
[11] Fox Chase Pain Management Associates PC, Doylestown, PA USA
[12] MossRehab, Elkins Pk, PA USA
[13] Univ Calif San Diego, Anesthesiol & Pharmacol, San Diego, CA 92103 USA
[14] Hosp Gen Univ, Valencia Sch Med, Valencia, Spain
[15] Hosp Univ Quiron Madrid, Madrid, Spain
[16] Univ Klinikum Dusseldorf, Neurochirurg Klin, Dusseldorf, Germany
[17] Sana Kliniken, Duisburg, Germany
[18] Univ Wales Hosp, Dept Neurosurg, Cardiff, S Glam, Wales
[19] Cleveland Clin, Cleveland, OH 44106 USA