Stephen Senn has worked for the NHS in England, as a lecturer in Scotland and in drug development in Switzerland (with CIBA-Geigy). Until recently he was Professor of Pharmaceutical and Health Statistics at University College London but since September 2003 he has been  Professor of Statistics at Glasgow University. His books, Cross-over Trials in Clinical Research (1993, 2^nd edition 2002) and Statistical Issues in Drug Development (1997) are published by Wiley and his latest book, Dicing with Death (2003) by Cambridge University Press. In 2001, he was the first recipient of the George C Challis award for biostatistics of the University of Florida. He is a member of the editorial boards of Statistics in Medicine, Statistical Methods in Medical Research, Pharmaceutical Statistics and Applied Clinical Trials and is a section editor for the Wiley Statistics in Practice series.