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. 2019 Dec 23;6(1):e000523. doi: 10.1136/bmjresp-2019-000523

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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Study flow chart showing the number of participants involved in different phases. OSA, obstructive sleep apnoea; PSG, polysomnography.