Brambilla, Marco http://orcid.org/0000-0001-7338-3960
Vassileva, Jenia
Kuchcinska, Agnieszka
Rehani, Madan M.
Article History
Received: 21 July 2019
Revised: 15 September 2019
Accepted: 17 October 2019
First Online: 2 December 2019
Compliance with ethical standards
:
: The scientific guarantor of this publication is Madan M Rehani.
: The authors declare that they have no conflict of interest.
: No complex statistical methods were necessary for this paper.
: Written informed consent was not required for this study because no change of intervention in patient management was part of the work that involved data analysis retrospectively.
: Institutional Review Board approval was not required because only summary data (total numbers) were needed for the analysis. The centers providing data were responsible to follow their local rules.
: • retrospective• observational• multicenter study