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Gulya M, Rossi-George A, Hartshorn K, Vieira A, Rovee-Collier C, Johnson MK, Chalfonte BL.Gulya M, et al.J Exp Child Psychol. 2002 Mar;81(3):276-97. doi: 10.1006/jecp.2001.2654.J Exp Child Psychol. 2002.PMID: 11884091