[1] Washington Univ St Louis, Goldfarb Sch Nursing, Dept Med, Div Palliat Med,Ira Kodner Prof Res Support Care, St Louis, MO USA
[2] Washington Univ St Louis, Dept Med, Div Palliat Med, St Louis, MO USA
[3] Washington Univ St Louis, Goldfarb Sch Nursing, Div Palliat Med, St Louis, MO USA
[4] Washington Univ St Louis, Stokes Family Endowed Chair & Chief, Dept Med, Div Palliat Med, St Louis, MO USA
[5] Univ Penn, Sch Nursing, Dept Biobehav & Hlth Sci, Penn Integrates Knowledge Univ Prof, Philadelphia, PA USA
[6] Univ Penn, Perelman Sch Med, Dept Biostat Epidemiol & Informat, Philadelphia, PA USA
[7] Washington Univ St Louis, Goldfarb Sch Nursing, Dept Med, Div Palliat Med,Ira Kodner Prof Res Support Care, 4590 Childrens Pl Mailstop 90-29-931, St Louis, MO 63110 USA