The mysteries of geographic variability in nonmelanoma skin cancer incidence.
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D002280:Basal Cell Carcinoma / Q000453:epidemiology*; D002294:Carcinoma, Squamous Cell / Q000453:epidemiology*; D005060:Europe / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D012878:Skin Neoplasms / Q000453:epidemiology*; D014481:United States / Q000453:epidemiology