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This work was supported by National Natural Science Foundation of China (Grant Nos. 91748103, 61573208), Beijing Natural Science Foundation (Grant No. Z170001), and China Postdoctoral Science Foundation (Grant Nos. 2014M560985, 2015T80078). The authors gratefully acknowledge the insightful and very constructive comments from the anonymous reviewers.
Appendixes A–I.
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Figure 1
(Color online) Setup for real-time tracking of the cardia in a practical endoscopic screening procedure.
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