[1] Univ Klin Dusseldorf, F-75634 Dusseldorf, Germany
[2] Hannover Med Sch, Hannover, Germany
[3] Grp Hosp Pitie Salpetriere, Paris, France
[4] Univ Klin Bochum, F-75674 Bochum, Germany
[5] Hosp Clin Barcelona, Barcelona, Spain
[6] Hop Cochin, Paris, France
[7] Clin Puerta de Hierro, Madrid, Spain
[8] Univ Klin Kiel, Kiel, Germany
[9] Univ Klin Freiburg, Freiburg, Germany