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Schwertheim et al. Hepatoma Res 2020;6:41 I http://dx.doi.org/10.20517/2394-5079.2020.23 Page 13 of 14

Financial support and sponsorship
None.

Conflicts of interest
All authors declared that there are no conflicts of interest.

Ethical approval and consent to participate
Informed consent was obtained from each patient. The study complied with the Helsinki Declaration of 1975
and the Ethics Committee (Institutional Review Board) of the University Hospital Essen (reference number:
16-6917-BO).

Consent for publication
Not applicable.

Copyright
© The Author(s) 2020.

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