Sverre E Kjeldsen1, Krzysztof Narkiewicz2, Michel Burnier3, Suzanne Oparil4. 1. Department of Cardiology Oslo University Hospital Ullevaal, Kirkeveien 166 NO-0407 Oslo, Norway. 2. Department of Hypertension and Diabetology, Medical University of Gdansk, Gdansk, Poland. 3. Service of Nephrology and Hypertension, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland. 4. Vascular Biology and Hypertension Program, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.