Received: 17 July 2019
Accepted: 23 June 2020
First Online: 20 August 2020
Ethics approval and consent to participate
: This study was approved by the local comity of informatics and liberty (CIL) (n° <b>2020–067</b>). According to the French law (Code de la santé publique, Article R1121–1 Modifié par Décret n°2017–884 du 9 mai 2017 - art.2) no permission of the IRB for this purely retrospective study was required. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Written informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article. Mehdi Ouaissi member of editorial board member of BMC cancer journal declare no relationships with any companies, or journals whose products or services may be related to the subject matter of the article<b>.</b>