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;

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;

Main changes in the ¿COVID-19 in paediatrics¿ clinical practice guideline Javier González de Dios; Victoria Martínez Rubio; Álvaro Giménez Díaz de Atauri; Carlos Ochoa Sangrador; Enrique Rodríguez-Salinas Pérez; Sergio Flores Villar; Jaime Javier Cuervo Valdés;