[Conduct of epidemiologic studies in French cancer survivors: Methods, difficulties encountered and solutions provided. Lessons learned from the SIMONAL study on long-term toxicities after non-Hodgkin lymphoma treatment].

Introduction: Since the introduction of targeted therapies, specific lymphoma mortality has decreased. Possible long-term toxicities, however, are not known yet. This article describes the implementation of the SIMONAL study that investigates the hypothesis of an overconsumption of care after lymphoma treatment with a 10-year follow-up.