Helmet Non-Invasive Ventilation for COVID-19 Patients (Helmet-COVID): study protocol for a multicentre randomised controlled trial | BMJ Open

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Helmet Non-Invasive Ventilation for COVID-19 Patients (Helmet-COVID): study protocol for a multicentre randomised controlled trial

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Cite this article as:: Arabi YM, Tlayjeh H, Aldekhyl S, et al

Helmet Non-Invasive Ventilation for COVID-19 Patients (Helmet-COVID): study protocol for a multicentre randomised controlled trial

BMJ Open 2021;11:e052169. doi: 10.1136/bmjopen-2021-052169