[1] Baylor Coll Med, Dept Pathol, Houston, TX 77030 USA
[2] Baylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030 USA
[3] Baylor Coll Med, Interdepartmental Program Cell & Mol Biol, Houston, TX 77030 USA
[4] Univ British Columbia, Dept Med Genet, Ctr Mol Med & Therapeut, Child & Family Res Inst, Vancouver, BC, Canada
[5] Hannover Med Sch, Dept Pediat, D-3000 Hannover, Germany
[6] Hannover Med Sch, Dept Pathol, D-3000 Hannover, Germany
[7] Univ Minnesota, Dept Lab Med & Pathol, Minneapolis, MN 55455 USA
[8] Keio Univ, Sch Med, Dept Physiol, Tokyo 160, Japan
[9] Univ Toronto, Dept Med Genet & Microbiol, Toronto, ON M5S 1A1, Canada
[10] Natl Ctr Neurol & Psychiat, Donnelly Ctr Cellular, Dept Mental Retardat & Birth Defect Res, Natl Inst Neurosci, Tokyo, Japan
[11] Natl Hosp Org, Osaka Natl Hosp, Inst Clin Res, Osaka, Japan