Symposia.

Presents abstracts of papers highlighted at the 41st Annual Meeting of the European Society for Paediatric Endocrinology. "When One Is Not Enough: Endocrine Consequences of Haploinsufficiency," by J. Parks; "Williams-Beuren Syndrome," by L.A. Pérez-Jurado; "Genetics of Congenital Hypothyroidism," by R. Di Lauro; "Epidemiology and Clinical Aspects of Neonatal Diabetes," by P. Czernichow; "Transgenic and Genomic Approaches to the Study of Female Puberty," by S.R. Ojeda et al.