Article History
Received: 20 September 2018
Accepted: 13 February 2019
First Online: 6 March 2019
Compliance with ethical standards
:
: Anika Kleist declares that she has no conflict of interest. Frank Kerling and Hajo Hamer have received honoraria from Eisai, UCB, Desitin, Novartis, Glaxo Smith Kline, Janssen Cilag, Pfizer, Sanofi Aventis. Martin Winterholler declares that he has no conflict of interest. All data generated and analysed during the current study are included in this published article.
: 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. Furthermore, the study was approved by the Ethics Committee of the University of Erlangen-Nuremberg (Ethics vote no. 290-14Bc).
: Informed consent was obtained from all individual participants or their legal representatives included in the study.