“Conservative Treatment by Halo Vest for a 63-Year-Old Male With Traumatic Spondylolisthesis of the Second Cervical Levine-Edwards Type 2 (hangman’s fracture): A Case Report”. 2020. Indian Journal of Case Reports 6 (9): 540-44. https://doi.org/10.32677/IJCR.2020.v06.i09.019.