Y Wang1, J C Jones1, B R Kipp2, A Grothey3. 1. Departments of Oncology, The University of Tennessee, Memphis, USA. 2. Laboratory Medicine and Pathology, Mayo Clinic, Rochester, The University of Tennessee, Memphis, USA. 3. Departments of Oncology, The University of Tennessee, Memphis, USA; Medical Oncology, West Cancer Center, The University of Tennessee, Memphis, USA. Electronic address: agrothey@westclinic.com.