Maass, A
Düzel, S
Goerke, M
Becke, A
Sobieray, U
Neumann, K
Lövden, M
Lindenberger, U
Bäckman, L
Braun-Dullaeus, R
Ahrens, D
Heinze, H-J
Müller, N G
Düzel, E
Article History
Received: 14 January 2014
Revised: 7 August 2014
Accepted: 21 August 2014
First Online: 14 October 2014
Competing interests
: The authors declare no conflict of interest.