Hand, M L
VĂt, P
Krahulcová, A
Johnson, S D
Oelkers, K
Siddons, H
Chrtek, J Jr
Fehrer, J
Koltunow, A M G
Article History
Received: 28 January 2014
Revised: 30 May 2014
Accepted: 3 June 2014
First Online: 16 July 2014
Competing interests
: The authors declare no conflict of interest.