[1] Univ Pittsburgh, Dept Med, Div Gen Internal Med, Sect Decis Sci, 930 Scaife Hall, Pittsburgh, PA 15260 USA
[2] Univ Pittsburgh, Dept Med, Div Gen Internal Med, Sect Palliat Care & Med Eth, Pittsburgh, PA USA
[3] Univ Pittsburgh, Dept Psychiat, Pittsburgh, PA USA
[4] Brown Univ, Sch Med, Dept Med, Providence, RI 02912 USA