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Contributors CF-F, CG-L: Conceived and designed the study, CF-F, CG-L, EL, JC, ET , CB interpreted the results. CF-F: Collected the data. CF-F, CG-L, EL: Drafted the manuscript. CF-F, CG-L, EL, ET, JC, CB: Approved of the final version of the manuscript.
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 Not required.
Provenance and peer review Not commissioned; internally peer reviewed.
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