1. Department of Cardiology; Aberdeen Royal Infirmary; Foresterhill; Aberdeen; UK
2. Medical Statistics Team; Section of Population Health; University of Aberdeen, Polwarth Building; Foresterhill; Aberdeen; UK
3. Aberdeen Centre for Trauma Research; Faculty of Health and Social Care, The Robert Gordon University; Aberdeen; UK
4. Division of Medicine and Therapeutics; Ninewells Hospital and Medical School; Dundee; UK