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Article History

Received: 2 October 2019

Revised: 12 March 2020

Accepted: 31 March 2020

First Online: 4 May 2020

Ethics approval and consent to participate

: The study was conducted in accordance with the Declaration of Helsinki and the principles of Good Clinical Practice and was approved by the institutional review board at University Hospital Frankfurt, Goethe-University (Frankfurt/Main, Germany). All participants were informed about the aim and procedure of this prospective study prior to measurement and gave written informed consent.

: No individual person’s data in any form were used in this study.

: The authors declare that all data supporting the findings of this study are available within the article or are available from the corresponding author upon reasonable request.

: The authors declare no competing interests.

: None.