1 Division of Epidemiology and Biostatistics School of Public Health, Georgia State University Atlanta, GA.
2 Department of Epidemiology and Department of Global Health Rollins School of Public Health, Emory University Atlanta, GA, Division of Infectious Diseases, Department of Medicine Emory University School of Medicine Atlanta, GA.
3 Division of Pulmonary, Allergy and Critical Care Department of Medicine, University of Massachusetts Medical School Worcester, MA USA <email></email>, Email: mjmagee@gsu.edu.