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In the paper by Burge, K. M., Perry, H. O., and Stickler, G. B., "Familial" Scleroderma (Arch Derm99:681-687 [June] 1969), the second sentence should have read: "In another comprehensive monograph, Jablońska2 expressed doubt about the hereditary aspect of scleroderma and noted its infrequent occurrence in families." The published paper carried the word "frequent" where "infrequent" should have been.
ERRATUM. Arch Dermatol. 1969;100(5):558. doi:10.1001/archderm.1969.01610290042008