English: Chicago, IL - ASCO 2013 Annual Meeting: - Attendees during the Leadership Development Program Orientation Session at the American Society for Clinical Oncology (ASCO) Annual Meeting here today, Friday May 31, 2013. Over 30,000 physicians, researchers and healthcare professionals from over 100 countries are attending the meeting which is being held at the McCormick Convention center and features the latest cancer research in the areas of basic and clinical science. Photo by © ASCO/Phil McCarten 2013 Technical Questions: todd@toddbuchanan.com; ASCO Contact: photos@asco.org This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.