Natalia Shafiqa1, Ari Manuel2, Gregory Y H Lip3, Sriram Iyer4. 1. Foundation Year Two Doctor Aintree University Hospital, Lower Lane, Fazakerley, Liverpool, L9 7AL. 2. Respiratory Consultant and Senior Clinical Lecturer Liverpool Centre for Cardiovascular Science, University of Liverpool, Brownlow Hill, Liverpool, L69 7TX. 3. Professor of Cardiovascular Medicine Liverpool Centre for Cardiovascular Science, University of Liverpool, Brownlow Hill, Liverpool, L69 7TX. 4. Respiratory Consultant and Sleep Physician, and Sleep and Ventilation Lead Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield Teaching Hospital, Herries Road, Sheffield, S5 7AU.
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