title: Effects of chronic shock on cooperation: a potential model of learned chronic pain behavior.
mesh_terms: D000818:Animals; D002908:Chronic Disease; D004597:Electroshock; D005260:Female; D006380:Helplessness, Learned / Q000523:psychology*; D006801:Humans; D010146:Pain / Q000523:psychology*; D051381:Rats; D011919:Rats, Inbred Strains; D012931:Social Environment