Ethics approval and consent to participate
The study was approved by the institutional review board of reference of the Joan XXIII University Hospital and the Pere Virgili Research Institute (IRB# CEIM/066/2020) and each participating centre. It has also been performed in accordance with the Declaration of Helsinki. The ethics committee (the Joan XXIII University Hospital and the Pere Virgili Research Institute (IRB# CEIM/066/2020)) did not consider it necessary to sign informed consent given the pandemic status considerations and the epidemiological characteristics of the study.