About the Authors

Thierry Thomas

Affiliation Service Rhumatologie, CHU, St Etienne, France

Françoise Amouroux

Affiliation UFR Sciences Pharmaceutiques, Bordeaux, France

Patrice Vincent

pvincent@lca-pharma.com

Affiliation LCA Pharmaceutical, Chartres, France

Competing Interests

TT and FA have declared that no competing interests exist. This study was sponsored by LCA Pharmaceutical. PV has shares in LCA Pharmaceutical. None of the authors has any other undescribed financial interests (stock ownership, patent applications, patent registrations, and research grants of other funding) related to the work described. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceptualization: PV. Formal analysis: PV. Investigation: PV. Methodology: TT. Visualization: PV. Writing – original draft: PV TT. Writing – review & editing: TT FA.