Retrospective Cohort Study
Copyright ©The Author(s) 2021.
World J Clin Cases. Dec 6, 2021; 9(34): 10472-10483
Published online Dec 6, 2021. doi: 10.12998/wjcc.v9.i34.10472
Figure 1
Figure 1 Schematic flowchart showing patient numbers at different study stages.