[1] Baylor Univ, Robbins Coll Hlth & Human Sci, Dept Publ Hlth, Waco, TX 76798 USA
[2] CUNY Hunter Coll, Brookdale Ctr Hlth Aging, New York, NY 10021 USA
[3] Georgetown Univ, Dept Med, Div Gen Internal Med, Washington, DC USA
[4] Johns Hopkins, Dept Epidemiol, Bloomberg Sch Publ Hlth, Baltimore, MD USA
[5] Univ Pittsburgh, Grad Sch Publ Hlth, Dept Behav & Community Hlth Sci, Pittsburgh, PA USA
[6] Univ Penn, Sch Nursing, Dept Family & Community Hlth, Philadelphia, PA 19104 USA
[7] Northwestern Univ, Feinberg Sch Med, Dept Med, Chicago, IL 60611 USA
[8] Univ Calif Los Angeles, Dept Family Med, Los Angeles, CA USA
[9] Univ Pittsburgh, Sch Publ Hlth, Dept Infect Dis & Microbiol, Pittsburgh, PA USA