Article History
Received: 11 April 2018
Accepted: 18 May 2018
First Online: 2 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Italian data were collected by ISTAT-National Institute of Statistics (Italy) according to the international standards and the Italian legislation (art. 9 del d.lgs. n. 322/89; d.lgs. n. 196/03). More information at: ExternalRef removedSpecific information on interviewees’ municipalities in “Multiscopo” surveys was used under a particular agreement between the University of Milan and ISTAT (Sede Regionale per la Lombardia).
: Informed consent was obtained from all individual participants included in the study before taking part.