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Thomas DA, Khalifa YM.Thomas DA, et al. Among authors: khalifa ym.Ophthalmic Plast Reconstr Surg. 2005 Mar;21(2):153-5. doi: 10.1097/01.iop.0000156499.84713.44.Ophthalmic Plast Reconstr Surg. 2005.PMID: 15778673
Sloan SR Jr, Khalifa YM, Buckley MR.Sloan SR Jr, et al. Among authors: khalifa ym.Invest Ophthalmol Vis Sci. 2014 Oct 30;55(12):7919-24. doi: 10.1167/iovs.14-14997.Invest Ophthalmol Vis Sci. 2014.PMID: 25358729
Geary A, Wen Q, Adrianzén R, Congdon N, Janani R, Haddad D, Timbo CS, Khalifa YM.Geary A, et al. Among authors: khalifa ym.BMC Med Educ. 2021 Apr 19;21(1):219. doi: 10.1186/s12909-021-02659-y.BMC Med Educ. 2021.PMID: 33874941Free PMC article.