To quantify changes in urinary excretion of aquaporin2 water channels (u-AQP2)， the sodium-potassium-chloride co-transporter (u-NKCC2) and the epithelial sodium channels (u-ENaC) during treatment with bendroflumethiazide (BFTZ)， amiloride and placebo.

Amiloride，Aquaporin2，Epithelial sodium channels，Hypertonic saline，Sodium，Sodium transporters，Sodium-potassium-chloride co-transporter，Thiazide，Urine，W