Figure 1
Transfers of patients between hospitals. The diagram also shows the level of care of the hospitals. The thickness of the arrows indicates the number of patients transferred into a particular direction, with the numerical value given at the respective arrowhead. The two numbers at each arrow that are separated by a vertical bar indicate the number of patients transferred due to medical reasons (first number) versus capacity reasons (second number), while the numbers given in parentheses indicate the number of patients transferred due to the need for ECMO therapy. The counts add up to the total number of transferred patients except one patient for whom the reason could not be identified.
