title: Acute versus chronic psychological reactions to combat.
mesh_terms: D000208:Acute Disease; D002908:Chronic Disease; D003130:Combat Disorders / Q000523:psychology* / Q000628:therapy; D006801:Humans; D013313:Stress Disorders, Post-Traumatic / Q000523:psychology*; D013312:Stress, Physiological / Q000517:prevention & control / Q000523:psychology