the hospitals

University Hospital Heidelberg (Germany), Prof. W. Wick

Universit├Ątsklinikum T├╝bingen (Germany), Prof. G. Tabatabai

University Hospital Geneva (Switzerland), Prof. P.-Y. Dietrich

Leiden University Medical Centre (The Netherlands), Dr. J.R. Kroep

Vall d’Hebron University Hospital (Spain), Prof. J. Sahuquillo

Rigshospitalet Copenhagen (Denmark), Prof. U. Lassen