Chen, Po-QuangPo-QuangChen2009-02-122018-07-132009-02-122018-07-131988http://ntur.lib.ntu.edu.tw//handle/246246/129104en-USMultiple Spinal Osteotomy and Zielk's VDS Instrumentation for Ankylosing Spondylitis Patients with Kyphotic Deformity