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Walk the Even Hospital Database by book and chapter — the raw source passages that ground Ask, DDx, and the rest.

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©2013 UpToDate ® Print Email Actinic keratosis Actinic keratosis causes rough, red, scaly spots on the skin. Reproduced from: Fitzpatrick TB, Johnson RA, Wolff K, Suurmond D. Color Atlas and Synopsis of Clinical Dermatology. Common and Serious Diseases. (4th Ed), McGraw-Hill, New York 2001. p.220.