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Harry Keil, M.D.
JAMA. 1943;123(13):857-858. doi:10.1001/jama.1943.02840480057024.
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To the Editor:—  Much interest has been aroused by the current reports of Dr. J. B. Howell and Dr. Stephan Epstein on dermatitis due to hair lacquer (The Journal, October 16) as well as by the communication of Dr. S. S. Greenbaum in which it was stated that a chemical analysis of the hair lacquer was being made. On communicating with Dr. Greenbaum I learned, as was to be expected, that a chemical study revealed little of real significance. Assuming that a complete analysis could be made, physical factors, such as the presence of a wetting agent, might be important in enhancing the sensitizing power of the causative ingredient. This is one of the important principles learned in studying dermatitis due to resin finished shorts and fabrics (Keil, Harry: J. Allergy14:477 [Sept.] 1943).Howell cited an example of dual hypersensitivity to hair lacquer and nail polish (which is


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