[1] CHU Cochin, INSERM, U129, IGGM, F-75014 Paris, France
[2] Univ Hosp Gasthuisberg VIB, B-3000 Louvain, Belgium
[3] Inst Pasteur, Lab Technol Cellulaires, F-75724 Paris 15, France
[4] Clin Genet Univ, Ctr Human Genet, UZ Gasthuisberg, B-3000 Louvain, Belgium
[5] Univ Nijmegen Hosp, Dept Human Genet 417, NL-6500 HB Nijmegen, Netherlands
[6] Ctr Hosp Tours, Serv Genet, Hop Bretonneau, F-37044 Tours, France
[7] Max Planck Inst Mol Genet, Berlin, Germany
[8] Abt Med Genet, D-80336 Munich, Germany
[9] Sanger Ctr, Cambridge, England