1 Critical Care and Respiratory Medicine, Royal Brompton Hospital, Imperial College, London, United Kingdom.
2 Respiratory Medicine, Royal Brompton Hospital, Imperial College, London, United Kingdom.
3 Thoracic Surgery, Royal Brompton Hospital, Imperial College, London, United Kingdom.
4 Anesthesia, Chelsea & Westminster Hospital, London, United Kingdom.
5 Craniomaxillofacial Surgery, Chelsea & Westminster Hospital, Imperial College, London, United Kingdom; for the Brompton-Chelsea Covid-19 tracheostomy consortium.