[1] Johns Hopkins Univ Hosp, Dept Nursing Adm, Baltimore, MD 21287 USA
[2] Johns Hopkins Univ, Sch Nursing, Baltimore, MD 21218 USA
[3] Johns Hopkins Univ Hosp, Baltimore, MD 21287 USA
[4] Univ Maryland, Sch Nursing, Baltimore, MD 21201 USA
[5] Johns Hopkins Univ Hosp, Nursing Adm, Baltimore, MD 21287 USA