1 School of Medicine, University of California, San Francisco, San Francisco, CA, USA.
2 Division of Hematology/Oncology, Department of Medicine, University of California, San Francisco, San Francisco, CA, USA.
3 Division of Hematology/Oncology, Department of Medicine, University of California, San Francisco, San Francisco, CA, USA; UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA, USA.
4 Division of Geriatrics, Department of Medicine, University of California, San Francisco, San Francisco, CA, USA; Division of Research, Kaiser Permanente Northern California, The Permanente Medical Group, Oakland, CA, USA. Electronic address: melisa.wong@kp.org.