Grassi, Alberto
Compagnoni, Riccardo http://orcid.org/0000-0001-8259-8488
Ferrua, Paolo
Zaffagnini, Stefano
Berruto, Massimo
Samuelsson, Kristian
Svantesson, Eleonor
Randelli, Pietro
Article History
Received: 2 November 2017
Accepted: 2 January 2018
First Online: 15 January 2018
Compliance with ethical standards
:
: The author(s) declare that they have no competing interests.
: No funding has been received for this study.
: Ethical approval was not obtained because this study was a large database study that consist of de-identified patients records that provides anonymous information.
: Informed consent was not obtained because this study was a retrospective review without the use of private patient information.