1 Hematology Section, Department of Pathology, Dr. Charles A. Janeway Child Health Center, St. John's, Newfoundland
In the article, "Deficiency of Factor XIII: Report of a Family from Newfoundland with Associated Mild Deficiency of Factor XII," by Dr. Mary Hanna (Pediatrics, 46: 611), on page 617, the XII under Effect of Transfusions should have been XIII. The correction has been made in the author's reprints.