Ko Andrew H
Division of Hematology/Oncology Gastrointestinal Oncology Program, Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco CA 94143, USA.
Lancet. 2016 Jul 16;388(10041):214-5. doi: 10.1016/S0140-6736(16)30680-8. Epub 2016 Jun 2.