Spine
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Retrospective study. ⋯ 5.
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Nationwide Readmissions Database Study. ⋯ 3.
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Population-based study. From 2008 to 2017, data from the national database of the Korean Health Insurance Review & Assessment Service were analyzed. The national insurance system and all medical expense bill data of the entire population are included in the database. ⋯ 3.
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Randomized Controlled Trial
Neck-Related Headache in Patients With Cervical Disc Disease After Surgery and Physiotherapy: A 1-Year Follow-up of a Prospective Randomized Study.
A prospective randomized multicenter trial. ⋯ 2.