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Velo Bellver JL, Rabago Torre L, López Lazareno N, Fernández-Pacheco I, Caballero A, Menchen PL, López de la Riva M, Alcalá Santaella R.Velo Bellver JL, et al.Rev Esp Enferm Apar Dig. 1982 Nov;62(5):362-7.Rev Esp Enferm Apar Dig. 1982.PMID: 7167669Spanish.No abstract available.