Schmitz, L Actinic keratoses seldom occur alone. [electronic resource] - Journal of the European Academy of Dermatology and Venereology : JEADV Apr 2018 - 513 p. digital Publication Type: Journal Article ISSN: 1468-3083 Standard No.: 10.1111/jdv.14908 doi Subjects--Topical Terms: HumansKeratosis, Actinic--complicationsSkin Neoplasms--complications