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Presented at Preliminary results presented at the ESRA 2018 meeting in Dublin (EIRE).
Contributors LR: conception and design, study’s performing, acquisition of data, drafting the article. AM: study’s performing, revising the draft. JdM: acquisition of data, analysis and interpretation of data, revising the draft. PZ, TB: revising the draft. DB: contribution to conception and design, substantial contribution for revising the draft. All the authors provided final approval for the revised version.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient consent for publication Not required.
Ethics approval This study was approved by the scientific committee of the Ecole de Chirurgie de l’Assistance Publique–Hôpitaux de Paris (France).
Provenance and peer review Not commissioned; externally peer reviewed.
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