[1] PUGET SOUND ONCOL CONSORTIUM, SEATTLE, WA USA
[2] SW ONCOL GRP, CTR STAT, SEATTLE, WA USA
[3] UNIV TEXAS, HLTH SCI CTR, SAN ANTONIO, TX USA
[4] UNIV TEXAS, MED BRANCH, GALVESTON, TX 77550 USA
[5] UNIV KANSAS, MED CTR, KANSAS CITY, KS 66103 USA
[6] JOHNS HOPKINS ONCOL CTR, BALTIMORE, MD USA
[7] OHIO STATE UNIV, CTR HLTH, COLUMBUS, OH 43210 USA