Zhou, Yusheng
von Lengerke, Thomas
Walter, Ulla
Dreier, Maren
Article History
Received: 12 October 2017
Revised: 20 December 2017
Accepted: 12 February 2018
First Online: 22 February 2018
Compliance with ethical statements
:
: The authors declare that they have no conflict of interest.
: This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.
: Informed consent was obtained from all individual participants included in the study.