ELMO helmet for CPAP to treat COVID-19-related acute hypoxemic respiratory failure outside the ICU: aspects of/comments on its assembly and methodologyAuthors' replyPatient self-inflicted lung injury and positive end-expiratory pressure for safe spontaneous breathingELMO 1 0: a helmet interface for CPAP and high-flow oxygen deliveryProtecting healthcare workers from SARS-CoV-2 infection practical indications.