Posterior spinal osteotomy, three-dimensional orthopedic treatment and third-generation pedicle screw fixation system for treatment of Scheuermann's disease: A data review of 9 cases in the same organization within 7 years Chinese Journal of Tissue Engineering Research . 2011, (43): 8167 -8170 .  DOI: 10.3969/j.issn.1673-8225.2011.43.045