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Publisher
- oxford university press / usa32
- ovid technologies (wolters kluwer health)24
- elsevier bv19
- lippincott williams & wilkins, inc19
- elsevier b.v.18
- elsevier17
- american association of neurological surgeons & the journal of neurosurgical publishing group15
- elsevier inc.10
- american association of neurological surgeons8