[1] Univ Maryland, Dept Psychol, Baltimore, MD 21201 USA
[2] Harvard Univ, Sch Med, Brigham & Womens Hosp,Pain Management Ctr, Dept Anesthesiol Perioperat & Pain Med, Chestnut Hill, MA USA
[3] Battelle Mem Inst, Ctr Publ Hlth Res & Evaluat, Columbus, OH 43201 USA