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—In the Dec 15 issue of The Journal, under the title "Screening Tests for Urinary Uroporphyrin," the third sentence of the paragraph no. 5 on page 1089 should read as follows: "The acetone disappears into the ether phase leaving the uroporphyrin dissolved in about 5 ml of an aqueous solution virtually free from interfering substances, and concentrated 3 to 4 times from the original urine."
Sentence Error.. JAMA. 1963;183(3):38. doi:10.1001/jama.1963.03700030014003