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Acknowledgments
The authors are grateful to Richard Medeiros, Rouen University Hospital Medical Editor, for his valuable advice in editing the manuscript.
Source of funding: The prospective cohort study was funded by the Assurance Maladie (Caisse Nationale, Paris, France).
Competiting interest statement: No conflict of interest declared.
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Pitrou, I., Dauchet, L., Bailly, L. et al. Mobile phone follow-up of subjects included in a prospective cohort study: unexpected difficulties. Eur J Epidemiol 22, 411–412 (2007). https://doi.org/10.1007/s10654-007-9130-5
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DOI: https://doi.org/10.1007/s10654-007-9130-5