Ju, Feng http://orcid.org/0000-0003-4137-5928
Beck, Karin
Yin, Xiaole
Maccagnan, Andreas
McArdell, Christa S http://orcid.org/0000-0002-5251-7541
Singer, Heinz P http://orcid.org/0000-0002-8542-3699
Johnson, David R http://orcid.org/0000-0002-6728-8462
Zhang, Tong
Bürgmann, Helmut http://orcid.org/0000-0002-5651-5906
Article History
Received: 28 March 2018
Revised: 19 August 2018
Accepted: 26 August 2018
First Online: 24 September 2018
Compliance with ethical standards
:
: The authors declare no competing interests.