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Khalifa F, Soliman A, Elmaghraby A, Gimel'farb G, El-Baz A.Khalifa F, et al. Among authors: gimel farb g.Comput Math Methods Med. 2017;2017:9818506. doi: 10.1155/2017/9818506. Epub 2017 Feb 9.Comput Math Methods Med. 2017.PMID: 28280519Free PMC article.