 Day 28 On day 28 in both treatment periods the study participants meet at the hospital again. After handing back the equipment used for the 24-hours ambulatory blood pressure and the urine sample the study participants are being tested with the intravenous Ang II infusion. The Ang II infusion is done with the study participant in a supine position. The Ang II infusion is given intravenously at a dosage of 5 ngkgmin for 30 min. The chosen dosage and length of duration is based on other studies and is safe 16-18. Before, during and after the Ang II infusion blood samples are taking from another intravenous access to analyse the blood for S-aldosterone, P-angiotensin II, Plasma renin activity, P-epinephrine, P-norepinephrine and N-PRO-ANP. 