[1] Univ Penn, Perelman Sch Med, Sch Nursing, Pain Practice, 418 Curie Blvd, Philadelphia, PA 19104 USA
[2] Emory Univ, Nell Hodgson Woodruff Sch Nursing, 1520 Clifton Rd, Atlanta, GA 30322 USA
[3] Amer Acad Nursing, 1000 Vermont Ave NW,Suite 910, Washington, DC 20005 USA
[4] Amer Assoc Coll Nursing AACN, 655 K St NW,Suite 750, Washington, DC 20001 USA
[5] Penn Med Princeton Hlth, 1 Plainsboro Rd, Plainsboro, NJ 08536 USA
[6] Massachusetts Gen Hosp, Inst Hlth Professionals, 36 1st Ave, Boston, MA 02129 USA