Chicago, IL - ASCO 2007 - Attendees listen attentively during the Genitourinary Cancer (Prostate and Testes) Oral Abstract Session on, Monday, June 4, 2007 at the American Society of Clinical Oncology's (ASCO) 43rd Annual Meeting. The meeting attracts more than 25,000 oncologists, researchers, and cancer care professionals from more than 100 countries. Date: Monday, June 4, 2007. Credit: Photo Courtesy © ASCO/Todd Buchanan 2007. ASCO Contact: Tiffany Reynolds/Communications Dept.; 703-519-1423. Technical Questions: email@example.com; 612-226-5154.