[1] Univ Virginia, Sch Med, Dept Publ Hlth Sci, Charlottesville, VA 22911 USA
[2] UT Southwestern Med Ctr, Dept Internal Med, Div Hematol & Oncol, Dallas, TX 75390 USA
[3] American Canc Soc, Surveillance & Hlth Equ Sci, Atlanta, GA 30303 USA
[4] Univ Penn, Perelman Sch Med, Philadelphia, PA 19104 USA
[5] American Canc Soc, Patient Support Dept, Kennesaw, GA 30144 USA