Extremely variable expressivity in Smith-Lemli-Opitz syndrome: Review of 4 cases María José Sánchez-Soler; Ana Teresa Serrano-Antón; Vanesa López-González; María Juliana Ballesta-Martínez; Encarna Guillén-Navarro;

Epidemiological difference could explain the higher infant mortality in Chile compared with Cuba Enrique Donoso; Jorge A. Carvajal;

Ethical and legal questions of anonymity and confidentiality in gamete donation Isolina Riaño-Galán; Carmen Martínez González; Sergio Gallego Riestra;