M. Cannellotto,M. Duarte,G. Keller,R. Larrea,E. Cunto,V. Chediack,M. Mansur,D. M. Brito,E. García,H. E. Di Salvo,F. Verdini,C. Domínguez,L. Jorda-Vargas,J. Roberti,G. Di Girolamo and E. Estrada. Hyperbaric oxygen as an adjuvant treatment for patients with COVID-19 severe hypoxaemia: a randomised controlled trial. Emerg Med J. 2022;39(2):10.1136/emermed-2021-211253.