Received: 5 April 2019
Accepted: 21 June 2019
First Online: 27 June 2019
Ethics approval and consent to participate
: This is an observational, non-interventional database study, re-utilising administrative data for the purpose of addressing a research question. The study was conducted under specific agreements between Fondazione ReS and Italian Regional/Local Health Facilities, participating in the ReS database. All these institutions have general legal and ethical frameworks that allow them to conduct research by making secondary use of administrative data and provided sufficient guarantee of individual records’ deidentification.
: Not applicable.
: The authors declare that they have no competing interests.