Answer to the Letter to the Editor of Qi Sun et al. concerning “Robot-assisted and conventional freehand pedicle screw placement: a systematic review and meta-analysis of randomized controlled trials” by Gao ST, et al. (Eur Spine J; 2017: DOI 10.1007/s00586-017-5333-y)
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Conflict of interest
The authors declare that they have no conflict of interest.
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