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To the Editor.—I wish to draw your attention to a conclusion drawn by the abstracter of my article entitled "The Treatment of Acne Vulgaris with Special Reference to X-Rays'' which appeared in the Medical Journal of Australia (2:656 [Nov. 9] 1935). He stated in the Archives (34:500 [Sept.] 1936) that I ascribed the good results I obtained to the fact that "standardization was checked by three dosimeters, and the cutaneous tolerance of most of the patients was tested before treatment was given."
I ascribed the good results not to these factors but to the fact that I did not allow for the extra 20 per cent to 25 per cent of the dose due to secondary radiation which is to be taken into consideration when large areas like the face or the back are treated. Consequently in delivering eight weekly one-fourth erythema doses as measured by the
Belisario JC. THE TREATMENT OF ACNE VULGARIS WITH SPECIAL REFERENCE TO ROENTGEN RAYS. Arch Derm Syphilol. 1937;35(2):294. doi:10.1001/archderm.1937.01470200094017
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