Ay, L
Thaler, J
Brix, J-M
Schernthaner, G H
Ay, C
Pabinger, I
Schernthaner, G
Article History
Received: 16 July 2015
Revised: 7 September 2015
Accepted: 20 September 2015
First Online: 1 December 2015
Competing interests
: The authors declare no conflict of interest.