Authors contributions:
Pasquale Capaccio: Conception and design of the study, writing and final revision of the manuscript
Giuseppe Riva: Data acquisition and interpretation, writing of the manuscript
Raffaella Cammarota: Data acquisition and interpretation
Michele Gaffuri: Data acquisition and interpretation
Giancarlo Pecorari: Conception and design of the study, final revision of the manuscript.
Conflict of interest: The authors have no conflict of interest to declare.
Funding sources: The authors have no funding sources to declare.