Andruszkow, Julia
Meinhold-Heerlein, Ivo
Winkler, Brigitte
Bruno, Benjamin
Knüchel, Ruth
Jäkel, Jörg http://orcid.org/0000-0003-2867-5360
Article History
Received: 28 February 2018
Revised: 10 April 2018
Accepted: 18 April 2018
First Online: 28 April 2018
Compliance with ethical standards
:
: The present study follows the guidelines of the revised UN declaration of Helsinki in 1975 and its latest amendment in 2008 (6th revision) and was approved by the Local Research Ethical Committee (No. 244/14).
: The authors declare that they have no conflict of interest.