Sagittal Splitting Laminoplasty for Spinal Canal Enlargement for Ossification of the Spinal Ligaments (OPLL and OLF) - Shimamura, Tadashi; Kato, Sadafumi; Toba, Tamotsu; Yamazaki, Ken; Ehara, Shigeru (Seminars in Musculoskeletal Radiology, 2001)