^aCentre of Cardiology, North Estonia Medical Centre, Tallinn, Estonia

^b1st Department of Internal Medicine, Semmelweis University, Budapest, Hungary

^cDepartment of Cardiology, Oslo University Hospital, Oslo, Norway

^dHypertension Unit, Department of Hypertension and Diabetology, Medical University of Gdansk, Poland

^eClinica Medica, Università Milano-Bicocca, Monza, Italy

Correspondence to Professor Margus Viigimaa, Centre of Cardiology, North Estonia Medical Centre, Sütiste St. 19, Tallinn 13419, Estonia E-mail: [email protected]