Funding for this research was provided by:
Fondazione Cariplo (IT) and Regione Lombardia (2014-2256)
Article History
Received: 10 December 2015
Accepted: 12 March 2016
First Online: 22 March 2016
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: For this type of study formal consent is not required.