Data availability
Individual participant data that underlie the results reported in this article (text, tables and figures) will be available to be shared, after de-identification and upon request. Data will be available for researchers who provide a methodologically sound proposal and they can be used only to achieve aims in the approved proposal. Proposals should be directed to elena.biagioli@marionegri.it; to gain access, data requestors will need to sign a data access agreement. Data will be available at the following website (“