Helmus, Janine
Poetsch, Jeremy
Pfeifer, Manuel
Bajanowski, Thomas
Poetsch, Micaela http://orcid.org/0000-0003-1364-6487
Article History
Received: 27 May 2019
Accepted: 9 September 2019
First Online: 18 October 2019
Compliance with ethical standards
: All samples were obtained after informed consent and with approval of the Medical Ethics Committee at the University of Duisburg-Essen in accordance with the Declaration of Helsinki and national laws (ethic vote number 10-4579).