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Alonso, A., de Irala, J. & Martínez-González, M.A. Representativeness, losses to follow-up and validity in cohort studies. Eur J Epidemiol 22, 481–482 (2007). https://doi.org/10.1007/s10654-007-9124-3
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DOI: https://doi.org/10.1007/s10654-007-9124-3