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. 2020 May 24;6:111. doi: 10.1186/s40792-020-00876-z

Fig. 4.

Fig. 4

ac Cholangioscopy findings. a At the first time, the membrane was cauterized several points randomly. b At the second time, the region cauterized at the first time was found sclerosis, and the other region was cauterized all over. c At the third time, a very small region of the membrane was found and cauterized