[1] Michael E DeBakey VA Med Ctr, Houston, TX USA
[2] Baylor Coll Med, Dept Med, Dan L Duncan Canc Ctr, Houston, TX 77030 USA
[3] VA Boston Healthcare Syst, Boston, MA USA
[4] Dana Farber Canc Inst, Boston, MA 02115 USA
[5] Harvard Med Sch, Dept Med, Boston, MA 02115 USA
[6] Univ Texas Southwestern Med Ctr Dallas, Dallas, TX 75390 USA
[7] St Joseph Hosp, Nashua, NH USA
[8] Boston Univ, Sch Med, Sect Gen Internal Med, Boston, MA 02118 USA
[9] Boston Univ, Sch Med, Sect Hematol & Med Oncol, Boston, MA 02118 USA