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. 2021 Oct 18;13(6):1781–1786. doi: 10.1111/os.13035

Fig 1.

Fig 1

Learning curve for portal setup. The initial 50 patients were divided into 10 subgroups with equal size. The average portal setup time of each subgroup were analyzed, and the result showed that the average portal setup time was consistent after subgroup seven. Therefore, the learning curve of portal setup was established.