1. Centre d’Investigation Clinique, Hôpital Necker (J.-L.B., N.B.), and Université Paris V, 75730 France
2. INSERM Unité 344, Molecular Endocrinology (S.J., C.K., M.-C.P.-V.), and Université Paris V, 75730 France
3. CNRS URA 1461 (M.-C.G., M.D.), Hôpital Necker, Paris Cedex 15, 75730 France
4. Department of Medicine (Z.W.), Ludwig Maximilians Universität, Munich 80336, Germany
5. Laboratory of Molecular Biology and Genetic Engineering, Université de Liège, Belgium (S.K.)