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APA Citation
Vethe, D., Langsrud, K., Scott, J., Engstøm, M., Olsen, A., Salvesen, Ø., Mathusiak, B., Sand, T., Morken, G., & Kallestad, H. (n.d.). 0048 Evening Blue-depleted Hospital Environment: The Effects On Melatonin. Sleep, 41, A19–A20. http://access.bl.uk/ark:/81055/vdc_100095512983.0x00004c