1. Allergy and Clinical Immunology Division, Department of Internal Medicine, Faculty of Medicine, Universitas Indonesia, Dr. Cipto Mangunkusumo Hospital, Jakarta 10430, Indonesia
2. Department of Internal Medicine, Universitas Indonesia Hospital, Depok 16424, Indonesia
3. Division of Clinical Virology, Center for Infectious Diseases, Graduate School of Medicine, Kobe University, Kobe 650-0017, Japan
4. Department of Host Defense, Immunology Frontier Research Center, Osaka University, Osaka 565-0871, Japan
5. Center for Southeast Asian Studies, Kyoto University, Kyoto 606-8304, Japan
6. Geriatric Division, Department of Internal Medicine, Faculty of Medicine, Universitas Indonesia, Dr. Cipto Mangunkusumo Hospital, Jakarta 10430, Indonesia