1. Swiss Cardiovascular Center, University of Bern, Inselspital, Freiburgstrasse, Bern 3010, Switzerland
2. Departement for BioMedical Research, University of Bern, 3008 Bern, Switzerland
3. University Medical Centre Ljubljana, Department of Hypertension, University of Ljubljana, Faculty of Medicine, Vodnikova 62, 1000 Ljubljana, Slovenia
4. Imperial College London, National Heart & Lung Institute, ICTEM Building, Du Cane Road, London W12 0NN, UK
5. London School of Hygiene and Tropical Medicine
6. Department of Clinical and Experimental Medicine, University of Pisa, Via Roma 67, Pisa 56126, Italy