1. School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
2. Graduate School of Nursing, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
3. United States Army Medical Command, Tripler Army Medical Center, Honolulu, HI 96859, USA
4. Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA