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Spina S, Giorno V, Román-Román P, Torres-Ruiz F.Spina S, et al.Bull Math Biol. 2014 Nov;76(11):2711-36. doi: 10.1007/s11538-014-0026-8. Epub 2014 Oct 25.Bull Math Biol. 2014.PMID: 25344426