1. Department of Hygiene, Sapporo Medical University School of Medicine, Sapporo, Japan.
2. Yangon Children's Hospital, Yangon, Myanmar.
3. Department of Microbiology, University of Medicine 2, Yangon, Myanmar.
4. National Health Laboratory, Yangon, Myanmar.
5. New Yangon General Hospital, Yangon, Myanmar.
6. Yangon General Hospital, Yangon, Myanmar.
7. Dawei General Hospital, Dawei, Myanmar.