[1] Oregon Hlth & Sci Univ, Dept Med, Dept Med Informat & Clin Epidemiol, Oregon Evidence Based Practice Ctr, Portland, OR 97201 USA
[2] Dartmouth Hitchcock Med Ctr, Dept Anesthesiol, Pain Management Ctr, Lebanon, NH 03766 USA
[3] Univ Utah, Dept Anesthesiol, Pain Res Ctr, Salt Lake City, UT USA
[4] Pacific Pain Med Consultants, Encinitas, CA USA
[5] Massachusetts Gen Hosp, Dept Anesthesia & Crit Care, Div Pain Med, Boston, MA 02114 USA
[6] Seattle Canc Care Alliance, Seattle, WA USA
[7] Kaiser Permanente NW, Pain Management Clin, Portland, OR USA
[8] Univ Miami, Sch Med Neurol Surg & Anesthesiol, Miami, FL USA
[9] Mem Sloan Kettering Canc Ctr, Dept Neurol, Pain & Palliat Care Serv, New York, NY 10021 USA
[10] Samuel S Stratton Dept Vet Affairs Med Ctr, Albany, NY USA
[11] Albany Coll Pharm & Hlth Sci, Albany, NY USA
[12] Univ Wisconsin, Paul P Carbone Comprehens Canc Ctr, Pain & Policy Studies Grp, Madison, WI 53706 USA
[13] Calif Dept Hlth Serv, EPIC Branch, Sacramento, CA USA
[14] New York Headache Ctr, New York, NY USA
[15] Yale Univ, Sch Med, Gen Internal Med Sect, New Haven, CT USA
[16] Yale New Haven Med Ctr, New Haven, CT 06504 USA
[17] Mem Sloan Kettering Canc Ctr, Dept Psychiat & Behav Sci, New York, NY 10021 USA
[18] Mem Sloan Kettering Canc Ctr, Dept Mol Pharmacol & Chem, Lab Mol Neuropharmacol, New York, NY 10021 USA
[19] Beth Israel Deaconess Med Ctr, Dept Pain Med & Palliat Care, New York, NY 10003 USA
[20] Univ Calif Davis, Div Bioeth, Sch Med, Davis, CA USA
[21] Univ Wisconsin, Sch Med & Publ Hlth, Madison, WI 53706 USA
[22] Beth Israel Deaconess Med Ctr, Pain & Emergency Med Inst, New York, NY 10003 USA
[23] Univ Calif San Francisco, Dept Physiol Nursing, San Francisco, CA 94143 USA