Sung, Kwang Hoon
Josewski, Jörn http://orcid.org/0000-0003-2469-1574
Dübel, Stefan
Blankenfeldt, Wulf http://orcid.org/0000-0001-9886-9668
Rau, Udo
Article History
Received: 20 April 2018
Accepted: 30 August 2018
First Online: 12 September 2018
Competing Interests
: The authors declare no competing interests.