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Alio Sanz JJ, Barbería Leache E, Moreno González PJ.Alio Sanz JJ, et al.Rev Sanid Hig Publica (Madr). 1989 Jan-Feb;63(1-2):63-70.Rev Sanid Hig Publica (Madr). 1989.PMID: 2534647Spanish.