Received: 27 April 2020
Accepted: 30 July 2020
First Online: 16 August 2020
Ethics approval and consent to participate
: The study was approved by the referral ethics committee (#5567 Hospital Universitario La Paz, Madrid, Spain) and the institutional review boards of all participating hospitals (Additional file InternalRef removed). For inclusion into the study, and due to national emergency regulations, verbal informed consent from the patient’s relatives or legal representative will be provided (Additional file InternalRef removed). See Additional file InternalRef removed for the SPIRIT checklist of the study protocol.
: Not applicable
: The authors declare that they have no competing interests in relation to this manuscript.