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APA Citation
MacEwen, C. J., Young, J. D. H., Barras, C. W., Ram, B., & White, P. S. (2001). value of nasal endoscopy and probing in the diagnosis and management of children with congenital epiphora. British journal of ophthalmology, 85(3), 314–318. http://access.bl.uk/ark:/81055/vdc_100135131976.0x000045