Zimmer, Bernd
Sino, Hiba
Article History
Received: 4 June 2017
Accepted: 6 February 2018
First Online: 15 March 2018
Compliance with ethical guidelines
:
: B. Zimmer and H. Sino declare that they have no competing interests.
: All studies on humans described in the present manuscript were carried out with the approval of the responsible ethical standards and in accordance with national law and the Helsinki Declaration of 1975 (in its current, revised form). Informed consent was obtained from all patients included in studies.