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APA Citation
Elemraid, M. A., Mackenzie, I. J., Fraser, W. D., Harper, G., Faragher, B., Atef, Z., Al-Aghbari, N., & Brabin, B. J. (n.d.). a case–control study of nutritional factors associated with chronic suppurative otitis media in yemeni children. Archives of disease in childhood, 96, A19. http://access.bl.uk/ark:/81055/vdc_100137784875.0x000052