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(Top) The preference for the innovative surgical navigation expressed in a Likert score (1–5, where >3 is in favor of the new technique). The average value is indicated by the arrow, while the standard deviation is indicated by the grey bar. Values are based on 10 completed questionnaires by seven surgeons. (Bottom) Level of surgeon satisfaction expressed in system usability score (SUS, 0–100, where values >70 are considered to be useful).
