Funding for this research was provided by:
Ministero della Salute (E72F16001450001)
Received: 3 January 2019
Accepted: 21 June 2019
First Online: 28 June 2019
Ethics approval and consent to participate
: This study was reviewed and approved by the ethical committee of the coordinating centre of ASST Niguarda Ca′ Granda in Milan (Italy) that gave permission to access administrative data (Registration number: 578–112018).
: Not Applicable.
: The Authors declare no conflict of interests.