Schellhas, Valentin
Glatz, Christian
Beecken, Ingo
Okegwo, Angelika
Heidbreder, Anna
Young, Peter
Boentert, Matthias http://orcid.org/0000-0001-6133-1397
Article History
Received: 11 December 2017
Revised: 15 January 2018
Accepted: 6 February 2018
First Online: 17 February 2018
Compliance with ethical standards
:
: PY has received speaker honoraria and financial research support from the Löwenstein Foundation, Bad Ems, Germany. All other authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge, or beliefs) in the subject matter or materials discussed in this manuscript.
: This study was approved by the local ethics authority.