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APA Citation
Eckert, K. A., Carter, M. J., Lansingh, V. C., Wilson, D. A., Furtado, J. M., Frick, K. D., & Resnikoff, S. (2015). a Simple Method for Estimating the Economic Cost of Productivity Loss Due to Blindness and Moderate to Severe Visual Impairment. Ophthalmic epidemiology, 22, 349–355. http://access.bl.uk/ark:/81055/vdc_100089568873.0x000037