[1] Univ Penn, Perelman Sch Med, Philadelphia, PA 19104 USA
[2] Kansas City Hospice & Palliat Care, Kansas City, MO USA
[3] Brown Univ, Warren Alpert Sch Med, Providence, RI 02912 USA
[4] Penn State Univ, Milton S Hershey Med Ctr, Coll Med, Hershey, PA 17033 USA
[5] Faith Presbyterian Hospice, Dallas, TX USA
[6] Arbor Hospice, Ann Arbor, MI USA
[7] Philadelphia Vet Affairs Med Ctr, Philadelphia, PA USA
[8] Hospice & Community Care, Lancaster, PA USA