1. Department of Internal Medicine; Hospital Mutua Terrassa; University of Barcelona; Barcelona Spain
2. Department of Nephrology; Hospital Universitario Central de Asturias; Oviedo Spain
3. Department of Preventive Medicine and Public Health; Universidad Autónoma de Madrid; Madrid Spain
4. Hypertension Unit; Hospital 12 de Octubre; Madrid Spain
5. CAP la Mina; University of Barcelona; Barcelona Spain