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In the letter to the Editor from Dr. M. G. Peterman in the June issue of the American Journal of Diseases of Children (71:659, 1946) 0.1 Gm. in the last line should read 0.1 mg.
CORRECTION. Am J Dis Child. 1946;72(3):370. doi:10.1001/archpedi.1946.02020320121018