Affiliation: | Houston Department of Health and Human Services, Houston, Texas, USA (S.G. Long, R.R. Arafat, J. Rogers);University of Texas School of Public Health, Houston (H.L. DuPont, B.J. Selwyn);St. Luke’s Episcopal Hospital, Houston (H.L. DuPont);Baylor College of Medicine, Houston (H.L. DuPont);Texas Department of State Health Services, Austin, Texas, USA (L. Gaul, E. Casey) |