[1] F Hoffmann La Roche & Co Ltd, Div Pharmaceut, CH-4002 Basel, Switzerland
[2] Univ Hosp Benjamin Franklin, Berlin, Germany
[3] Univ Hosp Eppendorf, Hamburg, Germany
[4] Univ Hosp, Kiel, Germany
[5] Univ Hosp Grosshadern, Munich, Germany
[6] Dr Horst Schmidt Hosp, Wiesbaden, Germany
[7] St Vincentius Hosp, Karlsruhe, Germany
[8] Med Univ Hosp, Hannover, Germany