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APA Citation
Bjorvatn, B., Pallesen, S., Grønli, J., Sivertsen, B., & Lehmann, S. (2014). prevalence and Correlates of Insomnia and Excessive Sleepiness in Adults with Obstructive Sleep Apnea Symptoms. Perceptual and motor skills, 118(2), 571–586. http://access.bl.uk/ark:/81055/vdc_100169203266.0x00000c