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;

New mutations associated with Hirschsprung disease Marta Lorente-Ros; Ane Miren Andrés; Alba Sánchez-Galán; Cinthia Amiñoso; Sixto García; Pablo Lapunzina; Jesús Solera-García;

Assessment of psychomotor development of Spanish children up to 3 years of age conceived by assisted reproductive techniques: Prospective matched cohort study María José Sánchez-Soler; Vanesa López-González; María Juliana Ballesta-Martínez; Jorge Gálvez- Pradillo; Rosario Domingo-Jiménez; Virgina Pérez-Fernández; Encarna Guillén-Navarro;