[1] Univ Texas MD Anderson Canc Ctr, Dept Expt Radiat Oncol, Houston, TX 77030 USA
[2] Univ Texas MD Anderson Canc Ctr, Dept Genet, Houston, TX 77030 USA
[3] NIA, Genet Lab, NIH, Biomed Res Ctr, Baltimore, MD 21224 USA
[4] CUNY Hunter Coll, Dept Chem, New York, NY 10021 USA
[5] Vrije Univ Amsterdam Med Ctr, Dept Clin Genet, NL-1081 BT Amsterdam, Netherlands
[6] Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Dept Radiat Oncol, Canc Inst New Jersey, New Brunswick, NJ 08903 USA
[7] Harvard Univ, Sch Med, Harvard Partners Ctr Genet & Genom, Howard Hughes Med Inst,Dept Genet, Boston, MA 02115 USA