[1] FRED HUTCHINSON CANC RES CTR, PROGRAM BIOL ONCOL, 1124 COLUMBIA ST, SEATTLE, WA 98104 USA
[2] UNIV WASHINGTON, SCH MED, DEPT PATHOBIOL, SEATTLE, WA 98195 USA
[3] UNIV WASHINGTON, SCH MED, DEPT IMMUNOL & MICROBIOL, SEATTLE, WA 98195 USA
[4] TOHOKU UNIV, SCH MED, DEPT UROL, SENDAI, MIYAGI 980, JAPAN
[5] UNIV WASHINGTON, SCH MED, DEPT PEDIAT, DIV HUMAN EMBRYOL & TERATOL, SEATTLE, WA 98195 USA