Answer to the Letter to the Editor concerning "Is the 4 mm height of the vertebral artery groove really a limitation of C1 pedicle screw insertion" by Da-Geng Huang, et al. Eur Spine J (2014) 23(5):1109-1114
1 Department of Spine Surgery, Honghui Hospital, Xi'an Jiaotong University College of Medicine, No. 76 Nanguo Road, Xi'an, 710054, Shaanxi, People's Republic of China, [email protected].