Hardy, R J Sodium excretion and sympathetic activity in relation to severity of hypertensive disease. [electronic resource] - Lancet (London, England) Aug 1976 - 471 p. digital Publication Type: Letter ISSN: 0140-6736 Standard No.: 10.1016/s0140-6736(76)92562-9 doi Subjects--Topical Terms: Blood Pressure DeterminationCircadian RhythmHumansHypertension--diagnosisNatriuresisSympathetic Nervous System--physiopathologyTime Factors