title: Pain response compared: after back surgery, cholecystectomy.
mesh_terms: D000328:Adult; D000368:Aged; D001415:Back / Q000601:surgery*; D002763:Cholecystectomy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010149:Postoperative Pain / Q000523:psychology*