Halo Gravity Traction for the Correction of Spinal Deformities in the Pediatric Population: A Systematic Review and Meta-Analysis. - Reed, Logan A.; Mihas, Alexander; Butler, Reed; Pratheep, Guna; Manoharan, Sakthivel Rajaram; Theiss, Steven; Viswanathan, Vibhu Krishnan (World Neurosurgery, 2022)