[1] Johns Hopkins Univ, Sch Med, Div Geriatr Med & Gerontol, Baltimore, MA 21224 USA
[2] Johns Hopkins Univ, Armstrong Inst Ctr Hlth Care Human Factors, Baltimore, MA 21224 USA
[3] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Clin Invest, Baltimore, MD USA
[4] Univ Wisconsin Coll, Dept Ind & Syst Engn, Madison, WI USA
[5] Univ Wisconsin, Sch Med & Publ Hlth, Dept Geriatr, Madison, WI USA
[6] Johns Hopkins Home Care Grp, Baltimore, MD USA
[7] Univ South Carolina, Coll Nursing, Columbia, SC USA
[8] Univ Penn, Sch Nursing, Biobehav Hlth Sci Dept, Philadelphia, PA 19104 USA
[9] Visiting Nurse Serv New York, Ctr Home Care Policy & Res, New York, NY USA
[10] MedStar Hlth Res Inst, MedStar Georgetown Surg Outcomes Res Ctr, Washington, DC USA
[11] MedStar Georgetown Univ Hosp, Washington, DC USA
[12] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Hlth Policy & Management, Baltimore, MD 21224 USA
[13] Johns Hopkins Sch Nursing, Dept Community & Publ Hlth, Baltimore, MD USA