[1] Coll Nursing, Philadelphia, PA USA
[2] Caril Clin, Champaign, IL USA
[3] Vanderbilt Univ, Sch Nursing, Nashville, TN 37240 USA
[4] Providence Med Grp, Palliat Care Dept, Anchorage, AK USA
[5] Univ Utah, Salt Lake City, UT 84112 USA
[6] Univ Colorado, Anschutz Med Campus, Boulder, CO 80309 USA