[1] Univ Utah, Coll Nursing, Salt Lake City, UT 84112 USA
[2] UCSF Med Ctr, Geriatr Med, San Francisco, CA USA
[3] Univ Utah Hlth, Geriatr Med, Salt Lake City, UT USA
[4] Univ Utah Hlth, Sociol, Salt Lake City, UT USA
[5] Comagine Hlth, Murray, UT USA