Limitations:
The single center and retrospective study design was our most important
limitation. We started using the modified Wisconsin protocol in July
2018. In the previous period, we did not have a standard treatment
protocol. Factors such as increased experience and better patient
selection after this period might also have an impact on the results. In
addition, although the number was small, performing IEC Fontan might
cause heterogeneity. We believe that studies with more homogeneous and
larger sample of patients are needed.