[1] UNIV WASHINGTON,SCH MED,SEATTLE,WA 98195
[2] SIDNEY FARBER CANC INST,DEPT BIOSTAT,BOSTON,MA 02115
[3] MD ANDERSON HOSP,DEPT RADIOTHERAPY,HOUSTON,TX
[4] RUSH PRESBYTERIAN ST LUKES MED CTR,DEPT THERAPEUT RADIOL,CHICAGO,IL 60612
[5] CLEVELAND CLIN EDUC FDN,DEPT RADIAT THERAPY,CLEVELAND,OH 44106