Blasel, Stella http://orcid.org/0000-0002-0717-616X
Vorwerk, Rieke
Kiyose, Makoto
Mittelbronn, Michel
Brunnberg, Uta
Ackermann, Hanns
Voss, Martin
Harter, Patrick N.
Hattingen, Elke
Article History
Received: 9 November 2017
Revised: 30 December 2017
Accepted: 4 January 2018
First Online: 30 January 2018
Compliance with ethical standards
:
: The authors declared that they have no conflict of interest.
: This study was approved by the institutional review board at Frankfurt Goethe University and was performed in accordance with the ethical standards for human subjects research. For this type of study formal consent is not required.