Funding for this research was provided by:
Regione Emilia-Romagna (Ricerca Regione-Università 2007–2009)
Università degli Studi di Ferrara (Fondo per l’incentivazione alla Ricerca FIR 2017)
Received: 4 March 2019
Accepted: 27 August 2019
First Online: 13 September 2019
Ethics approval and consent to participate
: Approval was granted by the ethics committee “<i>Comitato Etico Indipendente dell’Azienda Ospedaliero-Universitaria di Bologna, Policlinico S. Orsola-Malpighi”,</i> committee’s reference number 061/2008/O/Tess<i>.</i> A written consent was collected for all individuals enrolled in the study. The written consent was also obtained and preserved from some old patients that during the study (a few years) are died.
: Not applicable.
: The authors declare that they have no competing interests.