Cheng, G
Bolzenius, K
Joslowski, G
Günther, A L B
Kroke, A
Heinrich, J http://orcid.org/0000-0002-9620-1629
Buyken, A E
Article History
Received: 2 January 2014
Revised: 3 May 2014
Accepted: 1 June 2014
First Online: 9 July 2014
Competing interests
: The authors declare no conflict of interest.