The value of local validation of a predictive model. A nomogram for predicting failure of non-invasive ventilation in patients with SARS-COV-2 pneumonia Héctor Hernández Garcés; Alberto Belenguer Muncharaz; Francisco Bernal Julián; Irina Hermosilla Semikina; Luis Tormo Rodríguez; Estefanía Granero Gasamans; Clara Viana Marco; Rafael Zaragoza Crespo;

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Switches in non-invasive respiratory support strategies during acute hypoxemic respiratory failure: Need to monitoring from a retrospective observational study Francisco José Parrilla-Gómez; Judith Marin-Corral; Andrea Castellví-Font; Purificación Pérez-Terán; Lucía Picazo; Jorge Ravelo-Barba; Marta Campano-García; Olimpia Festa; Marcos Restrepo; Joan Ramón Masclans;