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Calvo A, Martínez E, Pastor LM, Vázquez JM, Roca J.Calvo A, et al.Reprod Nutr Dev. 1997 Nov-Dec;37(6):661-73. doi: 10.1051/rnd:19970605.Reprod Nutr Dev. 1997.PMID: 9477435Free article.
Villaverde R, Pastor LM, Calvo A, Ferrán A, Sprekelsen C.Villaverde R, et al. Among authors: calvo a.Acta Otolaryngol. 1994 Jul;114(4):453-7. doi: 10.3109/00016489409126086.Acta Otolaryngol. 1994.PMID: 7976319