Article History
Received: 26 March 2019
Accepted: 7 July 2019
First Online: 2 August 2019
Compliance with ethical guidelines
:
: C. Hauck, M. Schipfer, T. Ellrott, and B. Cook declare that they have no competing interests.
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and its later amendments. Informed consent to be included in the study was obtained from all participants.