1. Bayer Pharma AG; Global Clinical Statistics; D-13342 Berlin Germany
2. German Cancer Research Center; Department of Biostatistics; Im Neuenheimer Feld 280 D-69120 Heidelberg Germany
3. University of Göttingen; Humboldtallee 32 D-37073 Göttingen Germany
4. University of Heidelberg; Institute of Medical Biometry and Informatics; Im Neuenheimer Feld 305 D-69120 Heidelberg Germany
5. Laboratory of Biometry; University of Thessaly; Fytokou Street, N. Ionia GR-384 46 Magnesia Greece
6. University Medical Center Freiburg; Institute of Medical Biometry and Medical Informatics; Stefan-Meier-Str. 26 D-79104 Freiburg Germany
7. Quintiles; Centre for Statistics in Drug Development; BP 50137, F-67404 Illkirch CEDEX France
8. President of the International Society for Clinical Biostatistics (ISCB) and University of Heidelberg; Institute of Medical Biometry and Informatics; Im Neuenheimer Feld 305 D-69120 Heidelberg Germany