Critical appraisal (I): Fundamentals, tools, and application to scientific articles on outcomes and harmful effects Javier González de Dios; María Salomé Albi Rodríguez; Álvaro Gimeno Díaz de Atauri; Laura Cabrera Morente; Elena Pérez González; Carlos Ochoa Sangrador;

Breastfeeding duration and nutritional status of infants and toddlers in Spain. LAyDI study (PAPenRed) Silvia Martín-Ramos; Begoña Domínguez-Aurrecoechea; Manuela Sánchez Echenique; Rubén Garcia Pérez; Alicia Bonet Garrosa; Gonzalo Solís-Sánchez;

Comparative analysis of foetal and neonatal growth curves Josep Figueras-Aloy; Montserrat Izquierdo Renau; Ana Herranz Barbero; Lourdes Urquía Martí; Fermín García-Muñoz Rodrigo; Martín Iriondo-Sanz; Óscar García Algar;