In "Renal Glomerular Function and Long-Term Lithium Therapy" by J. Raymond DePaulo, Jr., M.D., Elsa I. Correa, M.D., and Daniel G. Sapir, M.D., in the March 1981 issue, the second to the last sentence in the first paragraph on page 327 should read, "They found a low mean GFR value of 61 ml/minute. . . ." The staff regrets this error.