[1] Univ Maryland, Sch Nursing, Dept Pain & Translat Symptom Sci, 655 W Lombard St,Suite 732, Baltimore, MD 21201 USA
[2] Univ Maryland, Sch Med, Grad Program Life Sci, Program Epidemiol & Human Genet, Baltimore, MD USA
[3] 711th Human Performance Wing,En Route Care, Wright Patterson AFB, OH USA
[4] Univ Maryland, Placebo Opin Ctr, Sch Nursing, Baltimore, MD USA
[5] Univ Maryland, Ctr Adv Chron Pain Res, Baltimore, MD USA
[6] Univ Maryland, Sch Med, Dept Anesthesiol & Psychiat, Baltimore, MD USA