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Montomoli, M. and Gonnelli, S. and Rossi, S. and Cuda, C. and Bonuso, A. and Caffarelli, C. and Del Santo, K. and Giacchi, M. and Nuti, R. (2005) Validation of a food frequency questionnaire for calcium intake assessment in men. Clinical cases in mineral and bone metabolism, 3 (3). p. 226. ISSN 1971-3266