Study setting
This meta-trial will include hospitalised patients with COVID-19
pneumonia who do not immediately require invasive mechanical ventilation
in participating institutions. A full list of participating institutions
will be available in each individual trial record on respective trial
registries. Studies from other countries may be added to this meta-trial
after publication of the meta-trial protocol, provided the studies meet
the criteria for the meta-trial (patient eligibility criteria,
intervention, core set of outcome measures).