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	1.	The relationship between obstructive sleep apnea and insomnia: a population-based cross-sectional polysomnographic study. [electronic resource] by Uhlig, B L Hagen, K Engstrøm, M Stjern, M Gravdahl, G B Sand, T Producer: 20200310 In: Sleep medicine vol. 54 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Sleep quality, arousal and pain thresholds in tension-type headache: a blinded controlled polysomnographic study. [electronic resource] by Engstrøm, M Hagen, K Bjørk, M Stovner, L J Stjern, M Sand, T Producer: 20141216 In: Cephalalgia : an international journal of headache vol. 34 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	The occipital alpha rhythm related to the "migraine cycle" and headache burden: a blinded, controlled longitudinal study. [electronic resource] by Bjørk, M H Stovner, L J Nilsen, B M Stjern, M Hagen, K Sand, T Producer: 20090612 In: Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology vol. 120 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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