1. Epi-Lab, Khartoum, Sudan
2. International Union Against Tuberculosis and Lung Disease, Paris, France; Division of Pulmonary Medicine, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan; and Department of Internal Medicine, School
of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
3. Ministry of Health, Madani, Gezira State, Sudan
4. Epi-Lab, Khartoum, Sudan; and Department of Family and Community Medicine, University of Dammam, Khobar, Saudi Arabia
5. World Health Organization, Eastern Mediterranean Regional Office, Cairo, Egypt
6. International Union Against Tuberculosis and Lung Disease, Paris, France