MIS-TLIF versus O-TLIF for single-level degenerative stenosis: study protocol for randomised controlled trial.

BMJ Open · 2021 · PMC7938991 · PMID 33674366

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may be significantno p-value reported

Cost-effectiveness estimation should be extrapolated with caution because there may be significant cost differences with other regions and countries.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.