[1] Gartnavel Royal Hosp, Dept Psychol Med, Glasgow G12 0XH, Lanark, Scotland
[2] Segawa Neurol Clin Children, Chiyoda Ku, Tokyo 1010062, Japan
[3] Baylor Coll Med, Dept Pathol, Houston, TX 77030 USA
[4] Karolinska Inst, Stockholm, Sweden
[5] Inst Brain Res, Moscow 107120, Russia
[6] Oregon Hlth & Sci Univ, Portland, OR 97201 USA
[7] Great Ormond St Hosp Sick Children, London WC1N 3JH, England
[8] Childrens Hosp Westmead, Dept Paediat & Child Hlth, Sydney, NSW, Australia
[9] Cardiff Univ, Dept Med Genet, Cardiff CF4 4XW, S Glam, Wales
[10] Stanford Univ, Sch Med, Howard Hughes Med Inst, Stanford, CA 94305 USA
[11] Stanford Univ, Sch Med, CNR Inst Genet & Biophys, Stanford, CA 94305 USA
[12] Univ Warwick, Dept Biol Sci, Coventry CV4 7AL, W Midlands, England
[13] Cent Middlesex Hosp, London NW10 7NS, England
[14] Kennedy Inst, Baltimore, MD 21205 USA
[15] TVW Telethon Inst Child Hlth, Res & Disabil Serv Commiss, Perth, WA, Australia
[16] Univ Calif Los Angeles, Sch Med, Dept Human Genet, Los Angeles, CA 90095 USA
[17] Birmingham Maternity Hosp, Dept Clin Genet, Birmingham B15 2TG, W Midlands, England
[18] Rett Ctr, SE-93223 Froson, Sweden
[19] Kurume Univ, Sch Med, Dept Pediat & Child Hlth, Fukuoka 8300011, Japan