%0 Journal Article %T Two Types of Laminoplasty for Cervical Spondylotic Myelopathy at Multiple Levels %A Shigeru Hirabayashi %A Takashi Matsushita %J ISRN Orthopedics %D 2011 %I Hindawi Publishing Corporation %R 10.5402/2011/637185 %U http://dx.doi.org/10.5402/2011/637185