postoperative magnetic resonance imaging of lumbar spine: mass of L4-L5 intervertebral disc space
postoperative magnetic resonance imaging of lumbar spine: mass of l4-l5 intervertebral disc space
postoperative magnetic resonance imaging of lumbar spine: mass of L4-L5 intervertebral disc space
postoperative magnetic resonance imaging of lumbar spine: mass of l4-l5 intervertebral disc space