Authors
A. H. Tarigan
Department of Pulmonology and Respiratory Medicine, Adam Malik General Hospital, Faculty of Medicine, Universitas Sumatera Utara, Indonesia
A. P. Tarigan
Asthma-COPD Division, Department of Pulmonology and Respiratory Medicine, Universitas Sumatera Utara Hospital, Faculty of Medicine, Universitas Sumatera Utara, Medan, North Sumatera, Indonesia
P. Pandia
Asthma-COPD Division, Department of Pulmonology and Respiratory Medicine, Universitas Sumatera Utara Hospital, Faculty of Medicine, Universitas Sumatera Utara, Medan, North Sumatera, Indonesia
P. C. Eyanoer
Department of Community and Preventive Medicine, Faculty of Medicine, Universitas Sumatera Utara, Medan, North Sumatera, Indonesia
