[1] Jonsson Comprehens Canc Ctr, Dept Pediat, Div Hematol Oncol, Gwyne Hazen Cherry Mem Labs, Los Angeles, CA USA
[2] Univ Calif Los Angeles, David Geffen Sch Med, Dept Pathol & Lab Med, Los Angeles, CA 90095 USA
[3] Univ Calif Los Angeles, Inst Mol Biol, Los Angeles, CA 90095 USA
[4] CALTECH, Div Biol, Pasadena, CA 91125 USA
[5] Univ Calif Los Angeles, Dept Microbiol Immunol & Mol Genet, Los Angeles, CA 90095 USA