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Persoon A, Huisman-de Waal G, Naber TA, Schoonhoven L, Tas T, Sauerwein H, van Achterberg T.Persoon A, et al.Clin Nutr. 2005 Apr;24(2):304-13. doi: 10.1016/j.clnu.2004.12.009.Clin Nutr. 2005.PMID: 15784493