Characteristics of tracheostomized patients followed up by a Palliative Care and Complex Chronic Patient Service Gemma Pons-Tomàs; Rodrigo Morales Painamil; Sílvia Ricart Campos; Eduard Pellicer Arasa; Lucía Peñarrubia Sanflorencio; Laura Ponce Corredor; Isabel Torrús López;

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;