Patricia McGettigan1, Anne-Marie Schjerning Olsen2. 1. William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK. Electronic address: p.mcgettigan@qmul.ac.uk. 2. Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Copenhagen, Denmark.