1. Statistical Methodology, Development; Novartis Pharma AG; Basel Switzerland
2. Institute of Social and Preventive Medicine; University of Bern; Bern Switzerland
3. Statistical Methodology, Oncology; Novartis Pharmaceuticals Corporation; East Hanover New Jersey U.S.A.
4. Department of Probability and Statistics; University of Sheffield; Sheffield UK
5. Statistical Laboratory; University of Cambridge; Cambridge UK
6. Statistical Methodology, Oncology; Novartis Pharma AG; Basel Switzerland