[1] Emory Univ, Winship Canc Inst, Dept Hematol & Oncol, Atlanta, GA 30322 USA
[2] Univ New Mexico, Canc Res & Treatment Ctr, Albuquerque, NM 87131 USA
[3] Univ Texas, Hlth Sci Ctr, Sch Nursing, Ctr Nursing Res, Houston, TX 77030 USA
[4] Texas Oncol PA, Houston, TX 77024 USA
[5] Univ Texas, MD Anderson Canc Ctr, Dept Gastrointestinal Med Oncol & Digest Dis, Houston, TX 77030 USA