Melasch, J
Rullmann, M
Hilbert, A
Luthardt, J
Becker, G A
Patt, M
Villringer, A
Arelin, K
Meyer, P M
Lobsien, D
Ding, Y-S
Müller, K
Sabri, O
Hesse, S
Pleger, B
Article History
Received: 29 July 2015
Revised: 25 September 2015
Accepted: 28 September 2015
First Online: 20 October 2015
Competing interests
: The authors declare no conflict of interest.