1. Center for Health Services Research, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
2. School of Nursing, Vanderbilt University, Nashville, Tennessee, USA.
3. Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
4. Department of Biomedical Informatics, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
5. IBM Watson Health, Cambridge, Massachusetts, USA.