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. Author manuscript; available in PMC: 2019 Jan 1.
Published in final edited form as: Int J Comput Assist Radiol Surg. 2017 Oct 27;13(1):37–45. doi: 10.1007/s11548-017-1677-3

Fig. 2.

Fig. 2

Two QR code examples used for eye tracking, showing a red telephone handset to denote hanging up a video call (left), and a printer to denote generating an instrument report (right)