The child who is hurting.
D000375:Aging; D000698:Analgesia / Q000379:methods; D002490:Central Nervous System / Q000503:physiopathology; D002648:Child; D002652:Child Behavior; D002675:Child, Preschool; D006801:Humans; D009369:Neoplasms / Q000503:physiopathology*; D010146:Pain / Q000503:physiopathology* / Q000523:psychology; D010290:Parents / Q000523:psychology