UCL Institute of Cardiovascular Science and Farr Institute, University College London, London, UK. Electronic address: d.swerdlow@ucl.ac.uk. BHF Glasgow Cardiovascular Research Centre, University of Glasgow, Glasgow, UK. Electronic address: david.preiss@glasgow.ac.uk. Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK; Department of Surgery, Division of Transplantation, and Clinical Epidemiology Unit, Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. UCL Institute of Cardiovascular Science and Farr Institute, University College London, London, UK. UCL Department of Medicine, University College London, London, UK. Department of Clinical Biochemistry, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark. Robertson Centre for Biostatistics, University of Glasgow, Glasgow, UK. MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, Cambridge, UK. Division of Pharmacoepidemiology and Clinical Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, Netherlands. University of Groningen, University Medical Centre Groningen, Department of Cardiology, Groningen, Netherlands. Center for Applied Genomics, Abramson Research Center, The Children's Hospital of Philadelphia, Philadelphia, PA, USA. UCL Genetics Institute, University College London, London, UK. UCL Research Department of Epidemiology and Public Health, University College London, London, UK. London School of Hygiene & Tropical Medicine, London, UK. Centre for Cardiovascular Genetics, University College London, London, UK. Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK. Department of Primary Care and Public Health, Cardiff University Medical School, Cardiff University, Cardiff, UK. Centre for Population Health Sciences, University of Edinburgh, Edinburgh, UK. Department of Epidemiology and Biostatistics, Imperial College London, London, UK. Jackson State University, Jackson, MS, USA. National Institute for Public Health and the Environment, Bilthoven, Netherlands. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, Netherlands. University Heart Center Hamburg, Department of General and Interventional Cardiology, Hamburg, Germany. Centre for Experimental Medicine, Institute of Clinical and Experimental Medicine, Prague, Czech Republic. National Institute of Public Health, Prague, Czech Republic. Lithuanian University of Health Sciences, Kaunas, Lithuania. Institute of Cardiology, Kaunas, Lithuania. Department of Epidemiology and Population Studies, Institute of Public Health, Faculty of Health Sciences, Jagiellonian University Medical College, Krakow, Poland. Institute of Internal and Preventive Medicine, Siberian Branch of Russian Academy of Medical Sciences, Novosibirsk, Russia. Dipartimento di Scienze Farmacologiche e Biomolecolari, Università di Milano, Milan, Italy; Centro Cardiologico Monzino IRCCS Milan, Milan, Italy. Atherosclerosis Research Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden; Science for Life Laboratory, Karolinska Institutet, Stockholm, Sweden. Division of Cardiovascular Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden. Biostatistics Unit, Milan, Italy. Department of Cardiology, Leiden University Medical Center, Leiden, Netherlands. Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, Netherlands. Department of Vascular Surgery, University Medical Center Utrecht, Utrecht, Netherlands. Department of Radiology, University Medical Center Utrecht, Utrecht, Netherlands. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, Netherlands; Department of Neurology and Neurosurgery, University Medical Center Utrecht, Utrecht, Netherlands. Department of Vascular Medicine, University Medical Center Utrecht, Utrecht, Netherlands. Department of Cardiology, Division of Heart and Lungs, University Medical Center Utrecht, Utrecht, Netherlands. Memorial Hospital of Rhode Island, RI, USA. University of Iowa, IA, USA. Translational Genomics Research Institute, Phoenix, AZ, USA. Department of Cardiology, Oslo University Hospital Rikshospitalet, University of Oslo, Oslo, Norway. Department of Medicine, University of Texas Health Science Centre, San Antonio, TX, USA; VERDICT, South Texas Veterans Health Care System, San Antonio, TX, USA. Weill Cornell Medical College, New York, NY, USA. NHMRC Clinical Trials Centre, University of Sydney, Sydney, NSW, Australia. Hematology and Oncology Therapeutic Delivery Unit, Quintiles, Milan, Italy. Department of Clinical Pharmacology and Epidemiology, Consorzio Mario NegriSud, Santa Maria Imbaro, Chieti, Italy. International Centre for Circulatory Health, Imperial College London, London, UK. Department of Medicine, University of California, San Francisco, CA, USA. Centre for Preventative Medicine, Oslo University Hospital Rikshospitalet, University of Oslo, Oslo, Norway. Denis Diderot University, Paris, France. Mitsukoshi Health and Welfare Foundation, Tokyo, Japan. BHF Glasgow Cardiovascular Research Centre, University of Glasgow, Glasgow, UK. Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK. Division of Preventive Medicine, Boston, MA, USA. ANMCO Research Center, Florence, Italy. Maria Cecilia Hospital, GVM Care and Research, E.S. Health Science Foundation, Cotignola (RA), Italy. Cardiac and Cell Sciences Research Institute, London, UK. St George's University of London, London, UK. UCL Department of Primary Care and Population Health, University College London, London, UK. MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK; School of Social and Community Medicine, University of Bristol, Bristol, UK. School of Social and Community Medicine, University of Bristol, Bristol, UK. School of Public Health, Minneapolis, MN, USA. Institute of Molecular Medicine and Human Genetics Center, University of Texas Health Science Center at Houston, Houston, TX, USA. Cardiovascular Health Research Unit of the Department of Medicine, Department of Epidemiology, and Department of Health Services, University of Washington, Seattle, WA, USA. Departments of Medicine and Pathology, University of Vermont, Colchester, VT, USA. Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA. Division of Sleep Medicine, Boston, MA, USA. GlaxoSmithKline, Stevenage, UK. Atherosclerosis Research Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden. Department of Epidemiology, University of Washington, Seattle, WA, USA. Department of Non-Communicable Disease Epidemiology, London, UK. MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK. MRCUnit for Lifelong Health and Ageing, Institute of Epidemiology and Health Care, University College London, London, UK. Cardiology Division, Massachusetts General Hospital, Boston, MA, USA; Program in Medical and Population Genetics, Broad Institute, Cambridge, MA, USA. Children's Hospital Oakland Research Institute, Oakland, CA USA. University of Minnesota, Minneapolis, MN, USA. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. Baylor College of Medicine, Department of Medicine, Division of Atherosclerosis and Vascular Medicine, Houston, TX, USA. Department of Genetics, University of North Carolina School of Medicine at Chapel Hill, Chapel Hill, NC, USA. UCL Institute of Cardiovascular Science and Farr Institute, University College London, London, UK; Department of Cardiology, Division of Heart and Lungs, University Medical Center Utrecht, Utrecht, Netherlands; Durrer Center for Cardiogenetic Research, ICIN-Netherlands Heart Institute, Utrecht, Netherlands. Institute of Internal and Preventive Medicine, Siberian Branch of Russian Academy of Medical Sciences, Novosibirsk, Russia; Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Medical Sciences, Novosibirsk, Russia. Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS, USA. Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.