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In the presentation entitled "Benign Familial Chronic Pemphigus" of the Society Transactions (Arch Derm103:557, 1971), the 22nd line of the second column should have stated that the Grenz ray treatment was given weekly for four weeks, not four times weekly.
ERRATUM. Arch Dermatol. 1971;104(2):217. doi:10.1001/archderm.1971.04000200105020