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APA Citation
Gnanalingham, K. K., Davies, B. M., Balamurali, G., Titoria, P., Doyle, P., & Abou-Zeid, A. (n.d.). improving levels of evidence in studies published in spinal journals from 1983 to 2011. British journal of neurosurgery, 27, 152–155. http://access.bl.uk/ark:/81055/vdc_100024527913.0x00002d