Liu X, Zheng B, Duan X, He W, Li Y, Zhao J, Zhao C, Wang L. Detecting performance difficulty of learners in colonoscopy: Evidence from eye-tracking. JEMR [Internet]. 2021 Jul. 13 [cited 2024 Apr. 19];14(2). Available from: https://bop.unibe.ch/JEMR/article/view/JEMR.14.2.5