[1] HARVARD UNIV, SCH MED, DANA FARBER CANC INST, DEPT MED ONCOL, BOSTON, MA 02115 USA
[2] CHRISTIE HOSP & HOLT RADIUM INST, DEPT MED ONCOL, MANCHESTER M20 9BX, LANCS, ENGLAND
[3] PRINCESS MARGARET HOSP, TORONTO M4X 1K9, ONTARIO, CANADA
[4] STANFORD UNIV, MED CTR, SCH MED, STANFORD, CA 94305 USA
[5] NIH, BETHESDA, MD 20205 USA
[6] INST GUSTAVE ROUSSY, F-94805 VILLEJUIF, FRANCE
[7] UNIV TEXAS, HLTH SCI CTR, DIV ONCOL, SAN ANTONIO, TX 78284 USA