[1] Harborview Med Ctr, Dept Med, Seattle, WA 98104 USA
[2] Univ Washington, Dept Med, Seattle, WA 98104 USA
[3] Vet Affairs Puget Sound Hlth Care Syst, Dept Med, Seattle, WA 98108 USA
[4] Univ Washington, Dept Biol Struct, Seattle, WA 98104 USA
[5] Stanford Univ, Sch Med, Dept Genet, Stanford, CA 94305 USA
[6] Stanford Univ, Sch Med, Dept Pediat, Stanford, CA 94305 USA