Dr. Samuel J. Klempner is a GI medical oncologist with research and clinical focus on esophagogastric cancers and cancer genomics. Dr. Klempner completed his residency in internal medicine at Brigham and Women’s Hospital/Harvard Medical School, followed by a combined hematology-oncology fellowship at Beth Israel Deaconess Medical Center/Harvard Medical School. While at Harvard, Dr. Klempner studied the mechanisms of resistance to targeted therapies in tumor cells in the lab of Dr. Lewis Cantley, PhD. Dr. Klempner is board certified in medical oncology, hematology, and internal medicine. Prior to joining The Angeles Clinic and Research Institute Dr. Klempner served as an Assistant Clinical Professor in the division of Hematology-Oncology at the University of California Irvine. Dr. Klempner’s research interests include the intersection of genomics and immunotherapies, oncogene-driven tumors, acquired resistance, and experimental therapeutics. Dr. Klempner is involved in professional societies including the American Society of Clinical Oncology (ASCO), American Association for Cancer Research (AACR), and the European Society for Medical Oncology (ESMO).

Sebastian Stintzing (M.D.), Professor of Medicine, is Head of the Division of Oncology and Haematology, Department of Medicine (CCM), Charité Universitaetsmedizin Berlin. His research focuses on predictive and prognostic biomarkers in the treatment of GI cancer with a special focus on colorectal cancer. From 2012 to 2014, he was a research fellow at the Sharon Carpenter Laboratory at the University of Southern California Norris Comprehensive Cancer Center, Los Angeles, U.S.A. He coordinated the translational part and assisted the clinical study conduct of several studies and earned his Postdoctoral Lecture Qualification with a thesis on prognostic and predictive factors in the treatment of metastatic colorectal cancer. In 2012, he received the prestigious Research Fellowship Award from the German Cancer Aid in Germany and started work at the University of Southern California. Dr. Stintzing is member of national and international cancer associations and speaker of the steering committee of the working group Colorectal Carcinoma of the German AIO.