[1] Indiana Univ, Sch Med, Div Hematol Oncol, Indianapolis, IN 46202 USA
[2] Med Oncol Ctr Rosebank, ZA-2193 Johannesburg, South Africa
[3] Univ Texas, Hlth Sci Ctr, San Antonio, TX 78229 USA
[4] Univ Vermont, Med Ctr, Burlington, VT 05401 USA
[5] Viventes Clin Beniu Needcoellin, Clin Radiotherapy, Berlin, Germany
[6] Rittenberg Oncol Consultants, Metairie, LA 70005 USA
[7] Inst Multidisciplinaire Oncol, CH-1272 Genolier, Switzerland