Spine
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A cross-sectional survey of orthopedic spine surgery fellowship directors in the United States. ⋯ 4.
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Retrospective case series of atlantoaxial rotatory fixed dislocation (AARFD). ⋯ 4.
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Retrospective, cross-sectional study. ⋯ 3.
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This was a case-control study. ⋯ 4.
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An analysis of the State Inpatient Database of North Carolina, 2005 to 2012, and the Nationwide Inpatient Sample, including all inpatient lumbar fusion admissions from nonfederal hospitals. ⋯ 3.