(1) Master’s Program in Tropical Medicine, Faculty of Medicine, Universitas Sumatera Utara, Adam Malik Hospital, Medan, Indonesia., Indonesia,
(2) Department of Pulmonology and Respiratory Medicine, Faculty of Medicine, Universitas Sumatera Utara, Adam Malik Hospital, Medan, Indonesia., Indonesia,
(3) Department of Community Medicine, Faculty of Medicine, Universitas Sumatera Utara, Medan, Indonesia., Indonesia,
(4) Department of Pediatrics, Faculty of Medicine, Universitas Sumatera Utara, Adam Malik Hospital, Medan, Indonesia., Indonesia,
(5) Department of Clinical Pathology, Faculty of Medicine, Universitas Sumatera Utara, Adam Malik Hospital, Medan, Indonesia., Indonesia,
(6) Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan., Taiwan, Province of China