About the Authors

Jean-François Viel

jean-francois.viel@univ-rennes1.fr

Affiliation Department of Epidemiology and Public Health, University Hospital, Rennes, France

Jean-Marie Studer

Affiliation Private gastroenterology practice, Montbéliard, France

Yves Ottignon

Affiliation Private gastroenterology practice, Besançon, France

Jean-Pierre Hirsch

Membership of the Franche-Comté Polyp Surveillance Study Group is provided in the Acknowledgments.

Affiliation Private gastroenterology practice, Besançon, France

Competing Interests

The authors have the following interests. Jean-Marie Studer, Yves Ottignon and Jean-Pierre Hirsch each own a private gastroenterology practice. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JFV JMS YO JPH. Performed the experiments: JMS JPH. Analyzed the data: JFV. Contributed reagents/materials/analysis tools: JMS YO JPH. Wrote the paper: JFV.