Factors associated with bone metabolism in patients with cervical ossification of the posterior longitudinal ligament accompanied with diffuse idiopathic skeletal hyperostosisShinji Horie, Yasunobu Sawaji, Kenji Endo, Hidekazu Suzuki, Yuji Matsuoka, Hirosuke Nishimura, Takeshi Seki and Kengo YamamotoSICOT-J, 4 (2018) 7DOI: https://doi.org/10.1051/sicotj/2017061