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Migdal C, Hitchings R.Migdal C, et al.Trans Ophthalmol Soc U K (1962). 1986;105 ( Pt 6):653-6.Trans Ophthalmol Soc U K (1962). 1986.PMID: 3310341Clinical Trial.
Migdal C, Hitchings R.Migdal C, et al.Trans Ophthalmol Soc U K (1962). 1985;104 ( Pt 1):62-6.Trans Ophthalmol Soc U K (1962). 1985.PMID: 3855338Clinical Trial.