関連ワード:  what is a c4 fracture    what is a cervical fracture    what is a cervical fracture of the spine    what is a c4 burst fracture    what is a fractured cervical vertebrae    what does a c4 fracture mean    what is a cervical compression fracture    what is a cervical dens fracture    what is a cervical burst fracture    what is a c2 cervical fracture