Ulmer, S.
Smorra, C.
Mooser, A.
Franke, K.
Nagahama, H.
Schneider, G.
Higuchi, T.
Van Gorp, S.
Blaum, K.
Matsuda, Y.
Quint, W.
Walz, J.
Yamazaki, Y.
Article History
Received: 26 May 2015
Accepted: 17 June 2015
First Online: 12 August 2015
Competing interests
: The authors declare no competing financial interests.