Critical appraisal (II): Application to scientific articles on therapeutic interventions, systematic reviews and meta-analyses Álvaro Gimeno Díaz de Atauri; María Salomé Albi Rodríguez; Elena Pérez González; Jaime Javier Cuervo Valdés; Juan Ruiz-Canela Cáceres; Javier González de Dios;

Protocol for treatment of constipation with polyethylene glycol 3350 plus electrolytes in critically ill children Jorge López; María G. Barba; Sarah N. Fernández; María J. Solana; Javier Urbano; César Sánchez; Jesús López-Herce;

Prevalence of gastrointestinal symptoms in autism spectrum disorder: A meta-analysis Isabel Lasheras; Matias Real-López; Javier Santabárbara;