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Valdivia-Gandur I, Engelke W, Beltrán V, Borie E, Fuentes R, Manzanares-Céspedes MC.Valdivia-Gandur I, et al. Among authors: beltran v.Head Face Med. 2016 Dec 1;12(1):35. doi: 10.1186/s13005-016-0131-z.Head Face Med. 2016.PMID: 27906068Free PMC article.