[1] Natl Inst Deafness & Other Commun Disorders, Bethesda, MD 20892 USA
[2] Natl Human Genome Res Inst, Bethesda, MD 20892 USA
[3] Stanford Univ, Sch Med, Dept Genet, Stanford, CA 94305 USA
[4] Stanford Univ, Sch Med, Dept Pediat, Stanford, CA 94305 USA
[5] Univ Wisconsin, Sch Med, Mcardle Lab Canc Res, Madison, WI 53706 USA