Received: 23 November 2018
Accepted: 6 January 2020
First Online: 14 January 2020
Ethics approval and consent to participate
: The study has been approved by the local institutional review board (IRB) committees of Rabin Medical Center and University Medical Center of the Johannes Gutenberg University Mainz. The need for informed consent was waived by the IRBs.
: Not applicable.
: The authors declare that they have no competing interests.