title: Letter: Comparison of Posterior Lumbar Interbody Fusion and Posterolateral Lumbar Fusion in Monosegmental Vacuum Phenomenon within an Intervertebral Disc.
authors: Department of Orthopedics, Spine Centre, Indian Spinal Injuries Centre, New Delhi, India.
authors: Vibhu Krishnan
authors: VK
authors: Viswanathan
authors: Department of Radiology, Government Medical College, Nagpur, India.
authors: Surabhi
authors: S
authors: Subramanian