[1] GENENTECH INC, DEPT RECOVERY PROC RES & DEV, S SAN FRANCISCO, CA 94080 USA
[2] GENENTECH INC, DEPT MED & ANALYT CHEM, S SAN FRANCISCO, CA 94080 USA
[3] NCI, CLIN ONCOL PROGRAM, BETHESDA, MD 20892 USA
[4] GENENTECH INC, DEPT CELL CULTURE RES & DEV, S SAN FRANCISCO, CA 94080 USA
[5] HARVARD UNIV, NEW ENGLAND DEACONESS HOSP, SCH MED, DIV HEMATOL ONCOL, BOSTON, MA 02215 USA