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In the original contribution "Hospital Treatment of Psoriasis" which appeared in the April 1970 Archives, on page 388 the phrase "Biopsy studies have demonstrated the initial disappearance of the granular layer...," should read "Biopsy studies have demonstrated the initial reappearance of the granular layer...."
ERRATUM. Arch Dermatol. 1970;102(2):237. doi:10.1001/archderm.1970.04000080109032