title: Nail-biting in subnormals.
mesh_terms: D000328:Adult; D000368:Aged; D000374:Aggression; D001007:Anxiety; D002648:Child; D003415:Crime; D006233:Persons with Disabilities; D006801:Humans; D008607:Intellectual Disability; D008297:Male; D008418:Masturbation; D008875:Middle Aged; D009259:Nail Biting; D010552:Personality Assessment; D012652:Self Mutilation; D012737:Sex Factors; D012907:Smoking; D012919:Social Behavior; D014705:Verbal Behavior