Helmus, Janine
Pfeifer, Manuel
Feiner, Laura-Kim
Krause, Laura Jasmin
Bajanowski, Thomas
Poetsch, Micaela http://orcid.org/0000-0003-1364-6487
Article History
Received: 15 August 2018
Accepted: 6 December 2018
First Online: 17 December 2018
Compliance with ethical standards
: All samples were obtained after informed consent and with the approval of the Medical Ethics Committee at the University of Duisburg-Essen in accordance with the Declaration of Helsinki and national laws.
: The authors declare that they have no conflict of interest.