Links[1] http://www.herz-gefaesschirurg.at [2] https://www.ctsnet.org/user/login?destination=user/419695 [3] https://www.ctsnet.org/print/home/mgorlitzer [4] https://www.ctsnet.org/society/ctsnet [5] https://www.ctsnet.org/society/eacts