in all patients examined plasma osmolality , plasma renin activity and plasma level of vasopressin and aldosterone were estimated twice : first after administration of a diet with a sodium chloride content of 100 to 120 mmol/a day and 8 hours recumbency and a second time after 3 days of dietary sodium chloride restriction ( 20 mmol/a day ) and 3-4 hours upright position .
C0037494
sodium chloride
C0206136
dietary sodium chloride