[1] Univ Calif Davis, Betty Irene Moore Sch Nursing, Sacramento, CA 95817 USA
[2] Univ Washington Bothell, Seattle, WA USA
[3] AARP Publ Policy Inst, Washington, DC USA
[4] Ctr Champ Nursing Amer, Washington, DC USA
[5] Univ Washington, Seattle, WA 98195 USA
[6] Oregon Hlth & Sci Univ, Sch Nursing, Portland, OR 97201 USA