[1] Univ Alabama Birmingham, Sch Nursing, 1720 Second Ave South, Birmingham, AL 35294 USA
[2] Dartmouth Coll, Geisel Sch Med, Hanover, NH USA
[3] Norris Cotton Canc Ctr, Canc Control Program, Lebanon, NH USA
[4] Univ Alabama Birmingham, Div Gerontol Geriatr & Palliat Care, Dept Med, 1720 Second Ave South, Birmingham, AL 35294 USA
[5] Hacettepe Univ, Sch Nursing, Ankara, Turkey