1. Department of Paediatrics, Siddhi Memorial Hospital, Bhaktapur, Nepal
2. Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
3. Department of Respiratory Infections, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
4. School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan