1. Clinical Pathology; GlaxoSmithKline Research and Development; Park Road Ware Hertfordshire SG12 0DP UK
2. Prostate Cancer Research Centre; Division of Surgery and Interventional Science; University College London; 3rd Floor Research Laboratories, 67 Riding House Street London W1W 7EJ UK
3. Department of Pharmaceutical and Biological Chemistry; The School of Pharmacy; University of London; 29/39 Brunswick Square London WC1N 1AX UK