[1] Evanston NW Healthcare, CORE, Evanston, IL 60201 USA
[2] Northwestern Univ, Inst Hlth Serv Res & Policy Studies, Evanston, IL 60208 USA
[3] Cook Cty Hosp, Div Med Oncol, Chicago, IL 60612 USA
[4] Cook Cty Hosp, Div Breast Oncol, Chicago, IL 60612 USA
[5] Advocate Illinois Mason Med Ctr, Angelo P Creticos Canc Ctr, Chicago, IL USA
[6] Univ Chicago, Dept Educ, Chicago, IL 60637 USA
[7] Univ Chicago, MESA Psychometr Lab, Chicago, IL 60637 USA
[8] Univ Arizona, Dept Family & Community Med, Tucson, AZ 85721 USA