Martins, Alfredo, Marco Fernandes, José Miguel Maia, Nuno Cortesão, Cláudia Ferrão, João Neves, and Pedro Leuschner. 2022. “Respiratory Failure: A Definition and Classification Proposal”. Internal Medicine 29 (4). Lisboa, Portugal:248-55. https://doi.org/10.24950/rspmi.1359.