Löb, S. http://orcid.org/0000-0001-5002-0470
Luetkens, K.
Krajinovic, K.
Wiegering, A.
Germer, C.-T.
Seyfried, F.
Article History
Accepted: 7 March 2018
First Online: 13 March 2018
Compliance with ethical standards
: All procedures performed were in accordance with the standards of the institutional ethical committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The authors declare that they have no conflict of interest.