Which one is a better predictor of prognosis in COVID-19: analytical biomarkers or PaO2/FiO2? M. Rubio-Rivas; J.M. Mora-Luján; A. Montero Sáez; M.D. Martín-Escalante; V. Giner Galvañ; G. Maestro de la Calle; M.L. Taboada Martínez; A. Muiño Míguez; C. Lumbreras-Bermejo; J.-M. Antón-Santos;

Reply to editor¿s letter ¿Executive summary of the consensus document on the management of perioperative anemia in Spain¿ M. Muñoz;

Potential role of lung ultrasonography in outpatient follow-up of patients with COVID-19. A systematic review F. Navarro-Romero; J. Olalla-Sierra; M.D. Martín-Escalante;