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—In the article entitled "Plasma Thromboplastin Antecedent (Factor XI) Deficiency in a Black Family," published in the June 1981 Archives (141:936-937), the wording in the Figure legend on page 937 should have read as follows: "Pedigree illustrating the plasma thromboplastin antecedent (PTA) and Hageman factor (HF) values. Squares denote men; circles, women; numbers without parentheses, activity value; numbers with parentheses, antigen value."
Incorrect Wording in Figure Legend.. Arch Intern Med. 1981;141(10):1270. doi:10.1001/archinte.1981.00340100026010