1. Network for Education and Support in Immunisation (NESI), University of Antwerp, 2610 Antwerp, Belgium
2. USAID Health Financing Activity/ThinkWell, Jakarta 10110, Indonesia
3. Medical Research Unit, School of Medicine, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
4. Department of Microbiology, School of Medicine, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
5. Department of Public Health, Faculty of Medicine, Universitas Padjadjaran, Bandung 45363, Indonesia
6. Faculty of Nursing, Universitas Padjadjaran, Bandung 45363, Indonesia
7. Department of Internal Medicine, School of Medicine, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
8. Department of Microbiology, School of Medicine, Universitas Mataram, Mataram 83125, Indonesia
9. Faculty of Medicine, Universitas Pattimura, Ambon 97233, Indonesia
10. Department of Pediatric, Rumah Sakit Umum Pusat Hasan Sadikin, Bandung 40161, Indonesia