[1] Johns Hopkins Bloomberg Sch Publ Hlth, Baltimore, MD USA
[2] Ctr Dis Control & Prevent, Atlanta, GA USA
[3] Vet Affairs Connecticut HealthCare Syst, West Haven, CT USA
[4] Kaiser Permanente Mid Atlantic States, Mid Atlantic Permanente Res Inst, Rockville, MD USA
[5] Univ Calgary, Calgary, AB T2N 1N4, Canada
[6] Vanderbilt Univ, Nashville, TN USA
[7] Kaiser Permanente Northern Calif, Kaiser Permanente Div Res, Oakland, CA USA
[8] Northwestern Univ, Chicago, IL 60208 USA
[9] Univ Washington, Seattle, WA 98195 USA
[10] British Columbia Ctr Excellence HIV AIDS, Vancouver, BC, Canada
[11] Univ N Carolina, Chapel Hill, NC USA
[12] Harvard Sch Publ Hlth, Boston, MA USA
[13] Univ Cent Caribe, Bayamon, PR USA