1. Department of Biomedical Informatics and Health Education, University of Washington School of Medicine, Seattle, Washington, USA
2. Department of Health Services, School of Public Health, University of Washington, Seattle, Washington, USA
3. Science and Engineering Department, University of Washington, Seattle, Washington, USA
4. Department of Physics, University of Washington, Seattle, Washington, USA
5. Information School, University of Washington, Seattle, Washington, USA
6. Department of Biobehavioral Nursing and Health Systems, University of Washington School of Nursing, Seattle, Washington, USA