Chicago, IL - 2015 ASCO Annual Meeting - Peter Gibbs, MBBS, FRACP, MD, discusses Detection of Circulating Tumor Cells and Circulating Tumor DNA during Early Detection of Cancer: Past, Present, and Future at the American Society of Clinical Oncology (ASCO) Annual Meeting here today, Friday, May 29, 2015. Over 30,000 physicians, researchers and healthcare professionals from over 100 countries are attending the 51st Annual Meeting which is being held at the McCormick Place convention center. The Annual Meeting highlights the latest findings in all major areas of oncology from basic through clinical and epidemiological studies. Photo by © ASCO/Max Gersh 2015 Technical Questions: todd@toddbuchanan.com; ASCO Contact: photos@asco.org