[1] Univ Penn, Abramson Canc Ctr, Philadelphia, PA 19104 USA
[2] Univ Penn, Dept Psychiat, Philadelphia, PA 19104 USA
[3] Univ Texas, MD Anderson Canc Ctr, Dept Behav Sci, Houston, TX 77030 USA
[4] Baylor Coll Med, Chron Dis Prevent & Control Res Ctr, Houston, TX 77030 USA
[5] NCI, Div Canc Control & Populat Sci, Bethesda, MD 20892 USA
[6] Duke Univ, Med Ctr, Dept Surg, Durham, NC 27706 USA
[7] Fred Hutchinson Canc Res Ctr, Seattle, WA 98104 USA