A novel index for quantifying the risk of early complications for patients undergoing cervical spine surgeries. - Passias PG; Diebo BG; Marascalchi BJ; Jalai CM; Horn SR; Zhou PL; Paltoo K; Bono OJ; Worley N; Poorman GW; Challier V; Dixit A; et al. (Journal of neurosurgery. Spine, 2017)