Text and Data Mining valid from 2018-12-03
Received: 9 April 2018
Revised: 3 October 2018
Accepted: 23 October 2018
First Online: 3 December 2018
Compliance with ethical standards
: The scientific guarantor of this publication is Prof. Jean Pierre Pelage.
: The authors declare that they have no conflict of interest.
: One of the authors has significant statistical expertise.No complex statistical methods were necessary for this paper.
: Written informed consent was not required for this study because it was a retrospective study, based on acquired data.
: Institutional Review Board approval was obtained.CPP Nord Ouest-France, reference: CPP A15-D30-VOL.26.
: • Retrospective• Observational• Performed at one institution