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Calvo Romero JM, Ramos Salado JL, García de la Llana F, Bureo Dacal JC, Bureo Dacal P, Pérez Miranda M.Calvo Romero JM, et al. Among authors: ramos salado jl.An Med Interna. 2001 Jun;18(6):309-11.An Med Interna. 2001.PMID: 11503577Spanish.