[1] Indiana Univ, Mel & Bren Simon Canc Ctr, Div Hematol Oncol, Indianapolis, IN 46202 USA
[2] Univ Vermont, Med Ctr, Burlington, VT 05401 USA
[3] Med Oncol Ctr Rosebank, ZA-2193 Johannesburg, South Africa
[4] Rittenberg Oncol Consultants, Metairie, LA 70005 USA
[5] Viventes Clin Beniu Needcoellin, Clin Radiotherapy, Berlin, Germany