Challenges and current status of children pain management in Spain Yasmina Mozo del Castillo; Blanca Toledo del Castillo; Lucía Navarro Marchena; Moisés Leyva Carmona; Laura Monfort Carretero; María Concepción Míguez Navarro; Itziar Marsinyach Ros;

Frequency, risk and impact measures in epidemiology Carlos Ochoa Sangrador; Eduardo Ortega Páez; Manuel Molina Arias; Fernando Carvajal Encina; Eduardo Cuestas Montañes;

Evidence-based medicine: 5 steps to navigate uncertainty Rafael Martín-Masot; Carlos Ochoa Sangrador; Jaime Javier Cuervo Valdés; Carolina Blanco Rodríguez; Paz González Rodríguez; Javier González de Dios;