Petter-Puchner, Alexander H.
Gruber-Blum, Simone
Redl, Heinz
Glaser, Karl S.
Fortelny, René H.
Article History
Received: 16 February 2017
Accepted: 21 February 2017
First Online: 10 March 2017
Conflict of interest
: A.H. Petter-Puchner, S. Gruber-Blum, H. Redl, K.S. Glaser, and R.H. Fortelny declare that they have no competing interests.