title: Extension of the "Hygiene Hypothesis" to the negative association between acne and atopy, hematological malignancies, and malignant melanoma.
authors.forename: M R
authors.initials: MR
authors.lastname: Namazi
mesh_terms: D000152:Acne Vulgaris / Q000209:etiology*; D003876:Dermatitis, Atopic / Q000209:etiology*; D019337:Hematologic Neoplasms / Q000209:etiology*; D006801:Humans; D006920:Hygiene; D015994:Incidence; D008545:Melanoma / Q000209:etiology*; D008954:Models, Biological