[1] Univ Pittsburgh, Inst Canc, Pittsburgh, PA USA
[2] Univ Missouri, Ellis Fischel Canc Ctr, Columbia, MO USA
[3] Kentuckiana Canc Ctr, Louisville, KY USA
[4] Louisiana Oncol Associates, Iberia, LA USA
[5] Albert Einstein Med Ctr, Philadelphia, PA 19141 USA