Ietza Bojorquez-Chapela is with the Department of Population Studies, El Colegio de la Frontera Norte, Tijuana, Baja California, Mexico. Richard F. W. Barnes, Richard S. Garfein, and Timothy C. Rodwell are with the Division of Global Public Health, Department of Medicine, University of California, San Diego. Jennifer Flood is with the Tuberculosis Control Branch, Division of Communicable Disease Control, California Department of Public Health, Richmond. Hugo López-Gatell and Celia Alpuche are with the...