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APA Citation
Darbyshire, J. L., Borthwick, M., Edmonds, P., Vollam, S., Hinton, L., & Young, J. D. (n.d.). measuring sleep in the intensive care unit: Electroencephalogram, actigraphy, or questionnaire?. Journal of the Intensive Care Society, 21, 22–27. http://access.bl.uk/ark:/81055/vdc_100098476915.0x00000f