Received: 26 July 2021
Accepted: 13 October 2021
First Online: 26 October 2021
: The study protocol was approved by the institutional review board “CHU Amiens Picardie ethics committee” (PI2018_843_0049) and we obtained permission from the CNIL (French national commission for informatics and freedom) as we respected the reference methodology N°4, as requested by the French law (2018-155 from the French official journal)). These two approval were necessary to access the clinical and personal data of patients. The need for consent is deemed unnecessary according to national regulations (Art 1121-1 of Public Health Code). Indeed, as requested by the French law (Art 1121-1 of Public Health Code), we have only to check the non-opposition of the patients (as it is a retrospective study, on “data” without any intervention for patients). We gave written information on the study to each patient. In case of opposition, patient was not included. The potential opposition is indicated in the medical record.
: Not concerned.
: The authors declare that they have no competing interests.