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Zafra-Ramírez N, Pérez-Milena A, Valverde-Bolívar FJ, Rodríguez-Bayón A, Delgado-Rodríguez M.Zafra-Ramírez N, et al. Among authors: valverde bolivar fj.Aten Primaria. 2019 Nov;51(9):562-570. doi: 10.1016/j.aprim.2018.05.010. Epub 2019 Jun 4.Aten Primaria. 2019.PMID: 31174917Free PMC article.Spanish.