[1] Vrije Univ Amsterdam, Med Ctr, Metab Unit, Dept Clin Chem, NL-1081 HV Amsterdam, Netherlands
[2] Univ Nijmegen, Med Ctr, Dept Human Genet, Nijmegen, Netherlands
[3] Greenwood Genet Ctr, JC Self Res Inst, Greenwood, SC 29646 USA
[4] CHU Cochin, INSERM, CNRS, Inst Cochin Genet Mol, Paris, France
[5] CHU Bretonneau, INSERM, U316, F-37044 Tours, France
[6] Max Planck Inst Mol Genet, Berlin, Germany
[7] Clin Genet Unit, Louvain, Belgium
[8] Cincinnati Childrens Hosp, Med Ctr, Cincinnati, OH USA