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To the Editor:—Dr. Grund's letter calls my attention to one of those errors that seem to creep into a paper in spite of all careful proofreading. The reference: "(Grund22)" should have been placed, not where it is, but at the end of the following sentence, which reads in part: ". . . . .the presence of more or less malformed pilosebaceous complexes . . . furnishes the hamartomatous foundation in which the adenoma develops." At this point reference to Dr. Grund's paper gives him credit for what he actually brings out in his comment. I regret that misplacing the reference has reversed its meaning.