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King CR, Escallier KE, Ju YS, et alObstructive sleep apnoea, positive airway pressure treatment and postoperative delirium: protocol for a retrospective observational studyBMJ Open 2019;9:e026649. doi: 10.1136/bmjopen-2018-026649
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King, Christopher R; Escallier, Krisztina E; Ju, Yo-El S; Lin, Nan; Palanca, Ben Julian; McKinnon, Sherry Lynn; and Avidan, Michael Simon, ,"Obstructive sleep apnoea, positive airway pressure treatment and postoperative delirium: Protocol for a retrospective observational study." BMJ Open. 9,8. . (2019).