1 Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA. Electronic address: [email protected].
2 Johns Hopkins School of Nursing, Baltimore, Maryland, USA.
3 Johns Hopkins School of Medicine, Baltimore, Maryland, USA.
4 Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA; Johns Hopkins School of Nursing, Baltimore, Maryland, USA; Johns Hopkins School of Medicine, Baltimore, Maryland, USA.
5 Boston College William F. Connell School of Nursing, Boston, Massachusetts, USA.
6 University of Texas Southwestern, Dallas, Texas, USA.
7 University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.
8 Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA; Johns Hopkins School of Nursing, Baltimore, Maryland, USA.
9 Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA; Johns Hopkins School of Medicine, Baltimore, Maryland, USA.