title: A new look at old acne.
mesh_terms: D000152:Acne Vulgaris / Q000175:diagnosis / Q000209:etiology / Q000628:therapy*; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D003879:Dermatologic Agents / Q000627:therapeutic use*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D012627:Sebaceous Glands / Q000503:physiopathology; D012629:Sebum / Q000378:metabolism; D012871:Skin Diseases / Q000175:diagnosis; D014212:Tretinoin / Q000627:therapeutic use*; D014801:Vitamin A / Q000031:analogs & derivatives*
chemical_list: D000900:Anti-Bacterial Agents; D003879:Dermatologic Agents; D014801:Vitamin A; D014212:Tretinoin