[1] Kantonsspital St Gallen, St Gallen, Switzerland
[2] UCL, London, England
[3] Univ Munster, Munster, Germany
[4] Ludwig Maximilians Univ Munchen, Munich, Germany
[5] Krankenhaus Lindenbrunn, Coppenbrugge, Germany
[6] Kepler Univ Klinikum, Neuromed Campus, Linz, Austria
[7] Univ Udine, Udine, Italy