Denk, Philipp
Buettner, Andrea http://orcid.org/0000-0002-6205-5125
Article History
Received: 7 February 2018
Revised: 14 March 2018
Accepted: 23 March 2018
First Online: 6 April 2018
Compliance with ethical standards
: The study was conducted in agreement with the Declaration of Helsinki. The study (registration number 180_16B) was approved by the Ethical Committee of the Medical Faculty, Friedrich-Alexander Universität Erlangen-Nürnberg. Informed consent was obtained from all subjects participating in the study.
: The authors declare that they have no competing interests.