Beckmann, J. http://orcid.org/0000-0002-0941-6729
Merz, C.
Huth, J.
Rath, B.
Schnurr, C.
Thienpont, E.
Article History
Received: 5 September 2017
Accepted: 27 April 2018
First Online: 21 May 2018
Compliance with ethical standards
:
: All authors disclose any actual or potential conflict of interest including any financial, personal or other relationships with other people or organizations that could inappropriately influence, or be perceived to influence, this work.
: The study was approved by the ethic committee of the local state medical council (Approv. No. F-2018-016) and describes a retrospective cohort and routine controls and does not interfere with GCP and ethical standards.