Funding for this research was provided by:
Received: 22 November 2018
Accepted: 20 June 2019
First Online: 9 July 2019
Ethics approval and consent to participate
: The study was performed with reimbursement data from the National System of Health Data (Système National des Données de Santé), in accordance with the General Conditions of Use of the Portal and the Data (Conditions Générales d’Utilisation du Portail et des Données) (version 3.0). Because the study was performed in accordance with the Article L1461–1 (paragraph III.6) of the French Public Health Code (Code de la santé publique) for public health purposes with fully anonymized data, there were no further requirements for ethical approval, consent to participate or data protection agency approval.
: Not applicable.
: The authors declare that they have no competing interests.