1. Graduate Group of Epidemiology, University of California, Davis, Davis, California, USA.
2. Department of Public Health Sciences, University of California, Davis, Sacramento, California, USA.
3. Betty Irene Moore School of Nursing, University of California, Davis, Sacramento, California, USA.
4. Center for Oncology Hematology Outcomes Research and Training (COHORT) and Division of Hematology and Oncology, University of California Davis School of Medicine, Sacramento, California, USA.