N	Investigators	Institution	City, Country
479	A. Turan, MD	Department of Anesthesiology, Trakya Üniversitesi	Edirne,Turkey
424	E. Kaufmann, MD, P. Kranke, MD, M. Kredel, MD, N. Roewer, MD, A. Schmelzer, MD, J Wermelt	Klinik und Poliklinik für, Anästhesiologie, Julius-Maximilians Universität	Wuerzburg, Germany
384	R.M. Jokela, MD, A. Soikkeli, MD, K. Korttila, MD	Department of Anesthesiology and Intensive Care, Helsinki University, Central Hospital	Helsinki, Finland
288	C. Isselhorst, MD, B. Fritz, MD, H. Kerger, MD	Department of Anesthesiology, University Hospital Mannheim	Mannheim, Germany
268	O. Danzeisen, MD, C. Heringhaus, MD, I. Schramm, S. Spieth	Department of Anesthesiology, Universität Freiburg	Freiburg, Germany
196	L. Eberhart, MD, K. Werthwein MD	Department of Anesthesiology Universität Ulm	Ulm, Germany
192	W. Leidinger, MD, J.N. Meierhofer, MD, U. Ruppert, MD, C. Zernak, MD	Abteilung für Anästhesiologie, operative Intensivmedizin und Blutprodukte, Kreiskrankenhaus Garmisch-Patenkirchen	Garmisch-Patenkirchen, Germany
192	A. Bacher, MD	Klinik für Anästhesie und Allgemeine, Intensivmedizin, Universität Wien	Wien, Austria
191	H. Bartsch, MD, H. Forst, MD	Department of Anesthesiology and Surgical Intensive Care, Zentralklinikum Augsburg	Augsburg, Germany
191	B. Book, MD, W. Hoeltermann, MD, C. Prause, MD	Department of AnesthesiologyKlinikum Lingen	Lingen, Germany
191	E. Palencikova, MD, S. Trenkler, MD	Department of Anesthesiology	Presov, Slovakia
190	H. Bause, MD, H. Bordon, MD, K. Stoecklein, MD	Department of Anesthesiology, Allgemeines, Krankenhaus Altona	Hamburg-Altona, Germany
189	F. Bach, MD, D. Buschmann, MD, F. Mertzlufft, MD, I. Vedder, MD	Department of Anesthesiology and surgical intensive care, v. Bodelschwingsche Anstalten Bethel	Bielefeld, Germany
189	C. Frenkel, MD, A. Paura, MD	Department of Anesthesiology, Klinikum Lüneburg	Lüneburg, Germany
185	K. Danner, MD, C. Madler, MD, B. Steinbrecher, MD	Institut für Anästhesiologie und Notfallmedizin, Westpfalz-Klinikum	Kaiserslautern, Germany
183	A. Kimmich, MD, E. Schneider, MD, M. Trick, MD	Department of Anesthesiology, Universitätsklinik Tübingen	Tübingen, Germany
181	A. Biedler, MD, D. Detzel, MD, W. Wilhelm, MD	Klinik fuer Anaesthesiologie und Intensivmedizin, Universitaetskliniken des Saarlandes	Homburg, Germany
181	M. Koivuranta, MD	Department of Anesthesiology, Central Lapland Hospital	Rovaniemi, Finland
180	M. Hinojosa, MD, M. Lucas, MD, S. Muñoz, PhD, R. Rincon, MD, P. Vila, MD	Department of Anesthesiology, Hospital Universitario Germans Trias I Pujol, Badalona	Barcelona, Spain
154	M. Hergert, MD, F. Liebenow, MD	Department of Anesthesiology and Intensive care, Klinikum Schwerin	Schwerin, Germany
118	H.-B. Hopf, MD, S. Pohl, MD	Department of Anesthesiology Kreisklinik Langen	Langen, Germany
113	G. Frings, MD	Anesthesiology Unit, Wedau-Kliniken	Duisburg, Germany
91	G. Fritz, MD, C. Hoehne, MD	Department of Anesthesiology, Charité, Campus Virchow-Klinikum	Berlin, Germany
89	H. Feierfeil, MD, J. Motsch, MD	Department of Anesthesiology, Universität Heidelberg	Heidelberg, Germany
77	A. Goebel, MD	Department of Anesthesiology, Eichhof Krankenhaus	Lauterbach, Germany
31	S. Alahuhta, MD, T. Kangas-Saarela, MD, P. Karjaleinen, MD	Department of Anesthesiology, Oulu University Hospital	Oulu, Finland
31	R. Sneyd, MD	Department of Anaesthetics, Derriford Hospital	Plymouth, UK
13	Koschel, MD, M. Lange, MD	Department of Anesthesiology, Waldkrankenhaus Rudolf Elle	Eisenberg, Germany

N indicates the number of patients enrolled at each site.