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APA Citation
Brahma, A., Ennis, F., Harper, R., Ridgway, A., & Tullo, A. (2000). visual function after penetrating keratoplasty for keratoconus: a prospective longitudinal evaluation. British journal of ophthalmology, 84(1), 60–66. http://access.bl.uk/ark:/81055/vdc_100135552056.0x000054