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Effect of a standard oral salt loading test on the renin-angiotensin-aldosterone system in healthy subjects - assessment of reference values

- assessment of age dependent reference values (ages 20 - 70 yrs) for plasma renin (activity and concentration), serum aldosterone and 24h urinary aldosterone (free and metabolites) during a regular diet and after a 3 day oral salt loading test-…

Aldosterone-Renin Ratio to diagnose Primary Aldosteronism and a Tool to select Proper Antihypertensive Treatment. The Dutch ARRAT Study.

With a standardized approach in a population with difficult to treat hypertension we want to explore how frequenty PHA is a cause of hypertension and what the test characteristics of the aldosterone-renin ratio are. Additionally we want to…

Normal values of salivary androstenedione and 17 hydroxy progesterone in children

To investigate the correlation between androstenedion in saliva and serum in all patients that have a request for androstenedion in serum.To collect age related reference ranges for healthy children on three different time points.

'Post-sarcoidosis' fatigue: a psychoneuroimmunologic approach

Exploring the incidence of fatigue after sarcoidosis, its severity and nature. Next we will try to associate fatigue with capacity to produce pro- and anti-inflammatory cytokines.Our secondary objective is testing the activity of the HPA-axis, the…