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APA Citation
Chen, Y., Li, X., Yin, H., Gilbert, C., Liang, J., Jiang, Y., Zhao, M., & , (2008). risk factors for retinopathy of prematurity in six neonatal intensive care units in Beijing, China. British journal of ophthalmology, 92(3), 326–330. http://access.bl.uk/ark:/81055/vdc_100135174261.0x000057