Received: 21 October 2019
Accepted: 18 December 2019
First Online: 31 December 2019
Ethics approval and consent to participate
: All patients were informed that their data could potentially be used for anonymised studies. Our study was approved by the committee of ethics and clinical research of the European Hospital Georges Pompidou, in the context of the authorization by the CNIL (Commission Nationale de l’Informatique et des Libertés) number 1922081, dated February 2nd 2016. Patients’ consent was not considered necessary, given the retrospective nature of the study and the anonymisation of all data.
: Not applicable.
: The authors declare that they have no competing interests.