Rina Sundari
Indonesia
, Department of Pulmonology & Respiratory Medicine, Faculty of Medicine, Universitas Sumatera Utara, Medan, Indonesia
Bintang Yinke Magdalena Sinaga
Indonesia
, Department of Pulmonology & Respiratory Medicine, Faculty of Medicine, Universitas Sumatera Utara, Adam Malik Hospital, Prof. Dr. Chairuddin P. Lubis, Universitas Sumatera Utara Hospital, Medan, Indonesia
Delores Elisabeth Sormin
Indonesia
, Department of Pulmonology & Respiratory Medicine, Faculty of Medicine, Universitas Sumatera Utara, Adam Malik Hospital, Medan, Indonesia
Arlinda Sari Wahyuni
Indonesia
, Department of Community Medicine, Faculty of Medicine, Universitas Sumatera Utara, Medan, Indonesia