1. Fred Hutchinson Cancer Research Center and University of Washington School of Medicine, Seattle, Washington (G.B.M., B.M.S., M.M., M.S., S.A.P., G.C., S.H., M.B., M.D.F., S.J.L., F.R.A., R.S., P.J.M., H.J.D.)
2. Fred Hutchinson Cancer Research Center, Seattle, Washington (G.S., T.A.G.)