[1] Northwestern Univ, Chicago Vet Affairs Healthcare Syst Lakeside Div, Chicago, IL 60611 USA
[2] Northwestern Univ, Robert H Lurie Comprehens Canc Ctr, Chicago, IL 60611 USA
[3] Northwestern Univ, Dept Med, Div Hematol Oncol, Chicago, IL 60611 USA
[4] Northwestern Univ, Inst Hlth Serv Res & Policy Studies, Chicago, IL 60611 USA
[5] Coalit Natl Canc Cooperat Grp, Philadelphia, PA USA
[6] Univ Michigan, Ctr Comprehens Canc, Ann Arbor, MI 48109 USA
[7] US Oncol Inc, Houston, TX USA