Sproll, Christoph
Naujoks, Christian
Holtmann, Henrik
Kübler, Norbert R.
Singh, Daman Deep
Rana, Majeed
Lommen, Julian http://orcid.org/0000-0002-8470-6478
Article History
Received: 27 September 2018
Accepted: 13 February 2019
First Online: 5 March 2019
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Ethics approval was granted by the Ethics Committee of the Heinrich-Heine-University of Düsseldorf and given the reference number 5586.
: Informed consent was obtained from all individual participants included in the study.
: Patients gave their written consent to take part in the study. The forms can be obtained from the corresponding author in German language..