1. Division of Pulmonary, Critical Care and Sleep Medicine, UC Davis Medical Center, Sacramento, CA, USA
2. Guardant Health, Redwood City, CA, USA
3. Division of Hematology/Oncology, Department of Internal Medicine, UC Davis School of Medicine, UC Davis Comprehensive Cancer Center, Sacramento, CA, USA
4. Medical Service, Hematology and Oncology, Veterans Affairs Northern California Health Care System, Mather, CA, USA
5. Chinh Phan is also affiliated to Veterans Affairs Northern California Health Care System, Mather, CA, USA
6. Division of Pulmonary, Critical Care and Sleep Medicine, UC Davis Medical Center, 4150 V Street, Suite 3400, Sacramento, CA 95817, USA