title: Message from the guest editor.
authors: Lawrence F
authors: LF
authors: Eichenfield
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D003879:Dermatologic Agents / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D007223:Infant; D012871:Skin Diseases / Q000175:diagnosis / Q000473:pathology / Q000628:therapy*
chemical_list: D003879:Dermatologic Agents