Waider, J
Popp, S
Lange, M D
Kern, R
Kolter, J F
Kobler, J
Donner, N C
Lowe, K R
Malzbender, J H
Brazell, C J
Arnold, M R
Aboagye, B
Schmitt-Böhrer, A
Lowry, C A
Pape, H C
Lesch, K P
Article History
Received: 23 June 2017
Accepted: 14 July 2017
First Online: 3 October 2017
Competing interests
: The authors declare no conflict of interest.