1 Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States; George Washington University School of Medicine & Health Sciences, Washington DC, United States.
2 George Washington University School of Medicine & Health Sciences, Washington DC, United States.
3 George Washington University Medical Faculty Associates, Washington DC, United States.
4 George Washington University Medical Faculty Associates, Washington DC, United States; George Washington University Center for Integrative Medicine, Washington DC, United States. Electronic address: mkogan@mfa.gwu.edu.