Department of Medicine, School of Medicine, Makerere University College of Health Sciences, Kampala, Uganda.Department of Medical Microbiology and Immunology, Faculty of Medicine, Gulu University, Gulu, Uganda.Department of Radiology and Radiotherapy, School of Medicine, Makerere University College of Health Sciences, Kampala, Uganda.Department of Medical Microbiology and Immunology, Faculty of Medicine, Gulu University, Gulu, Uganda.Department of Medicine, School of Medicine, Makerere University College of Health Sciences, Kampala, Uganda.Infectious Diseases Institute, Makerere University College of Health Sciences, Kampala, Uganda.Division of Pulmonology, Kiruddu National Referral Hospital, Kampala, Uganda.Department of Medicine, School of Medicine, Makerere University College of Health Sciences, Kampala, Uganda.Department of Medicine, Mulago National Referral Hospital, Kampala, Uganda.Division of Pulmonology, Kiruddu National Referral Hospital, Kampala, Uganda.Department of Medicine, Mulago National Referral Hospital, Kampala, Uganda.