1. Folkhälsan Institute of Genetics, Folkhälsan Research Center, Biomedicum Helsinki, Helsinki, Finland
2. Divisions of Nephrology and Cardiology, Helsinki University Central Hospital, Helsinki, Finland
3. Baker Heart Research Institute, Melbourne, Victoria, Australia
4. Cardiovascular Division, Guy's, King's, and St. Thomas' School of Medicine, Guy's Hospital, King's College, London, U.K