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Schematic of protocol. AHI, apnoea–hypopnoea index; BMI, body mass index; CPAP, continuous positive airway pressure; ECHO, echocardiogram; ESS, Epworth Sleepiness Score; FMD, flow-mediated dilatation; HbA1c, glycated haemoglobin; NOX, sleep testing device; ODI, overnight desaturation index; OSA, obstructive sleep apnoea; QoL, quality of life; SAT, subcutaneous adipose tissue; SU, sulphonylureas; T2DM, type 2 diabetes mellitus; VAT, visceral adipose tissue.
