Petr Kocna, university teacher, physician
<a href="//commons.wikimedia.org/wiki/User:Kocna" title="User:Kocna">Kocna</a>
CC BY 3.0
<a rel="nofollow" class="external free" href="http://www1.lf1.cuni.cz/~kocna/osob.htm">http://www1.lf1.cuni.cz/~kocna/osob.htm</a>