 On day 28 in the first treatment period the participants meet at the hospital again and are tested with an intravenous Angiotensin II infusion followed by continuous measurement of blood pressure and the following aldosterone response using blood samples. Blood pressure will be measured with Finger Plethysmography and vascular tonus will be evaluated with the use of Impedance Cardiography, Finger Plethysmography and Doppler Ultrasound measurements of blood flow before, during and after the Angiotensin II infusion. 