On the renal basis for essential hypertension: nephron heterogeneity with discordant renin secretion and sodium excretion causing a hypertensive vasoconstriction-volume relationship. - Sealey,J.E.; Blumenfeld,J.D.; Bell,G.M.; Pecker,M.S.; Sommers,S.C.; Laragh,J.H. (J Hypertens, 1988)