[Clinical investigation of causes of failed back surgery syndrome].
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology* / Q000517:prevention & control; D012086:Reoperation; D013577:Syndrome