1. Divison of Pulmonology, Department of Internal Medicine, Faculty of Medicine, Dr. Kariadi General Hospital, Diponegoro University, Semarang, Central Java, Indonesia
2. Fatima General Hospital, Ketapang Regency, West Kalimantan, Indonesia
3. Department of Internal Medicine, Faculty of Medicine, Dr. Kariadi General Hospital, Diponegoro University, Semarang, Central Java, Indonesia