Hypertension

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To the Editor.  —The article entitled "Two Techniques to Improve Adherence to Dietary Restriction in the Treatment of Hypertension" by Kaplan et al and published in the September Archives (1982;142:1638-1641) discusses validation of sodium intake and indicates that measurement of chloride in the urine is a new technique for monitoring sodium intake.However, in an article published in the June 1950 The Journal of the American Medical Association (143:721-724), we first reported on the use of a low sodium diet for the management of hypertension. This article also outlined the role of chloride testing in the urine as a measurement of sodium intake.