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Fung, S. S. M., Lemer, C., Russell, R. A. , Malik, R. & Crabb, D. P. (2013). Are practical recommendations practiced? A national multi-centre cross-sectional study on frequency of visual field testing in glaucoma. British Journal of Ophthalmology, 97(7), pp. 843-847. doi: 10.1136/bjophthalmol-2012-302903