1. Department of Biobehavioral Nursing and Health Informatics, University of Washington, Seattle, WA, USA
2. Office for Nursing Research, University of Washington, Seattle, WA, USA
3. Northwest Metabolomics Research Center, Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA, USA
4. Department of Biostatistics, University of Washington, Seattle, WA, USA
5. Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
6. Helfgott Research Institute, National University of Natural Medicine, Portland, OR, USA