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Article History

Received: 10 September 2018

Accepted: 10 December 2018

First Online: 11 January 2019

Ethics approval and consent to participate

: The study was approved by the <i>Comité consultatif sur le traitement de l’information en matière de recherche</i> (CCTIRS) (agreement number 13564), and the <i>Comité de Protection des Personnes</i> (CPP) of the CHU of Besançon 13–06, and <i>Commission nationale de l’informatique et des libertés</i> (CNIL) (agreement number 913594), France. For this retrospective study, the Ethics Committee did not require written informed consent but a non-opposition was verified for every patient. Patients who do not agree for their data to be used at a later date for research purposes can opt out by signaling their opposition; otherwise, in the absence of opposition, patients are deemed to have consented.

: Consent to publish is not applicable in this study.

: The authors declare that they have no competing interests.

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