Content validity of an instrument to measure young children's perceptions of the intensity of their pain.
D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D009730:Nursing Assessment; D010146:Pain / Q000451:nursing* / Q000503:physiopathology; D010148:Intractable Pain / Q000451:nursing* / Q000503:physiopathology; D010781:Photography