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APA Citation
Sherafat, H., Spry, P. G. D., Waldock, A., Sparrow, J. M., & Diamond, J. P. (2003). effect of a patient training video on visual field test reliability. British journal of ophthalmology, 87(2), 153–156. http://access.bl.uk/ark:/81055/vdc_100137789596.0x00004f