1. Department of Microbiology, Mymensingh Medical College, Mymensingh, Bangladesh.
2. Pabna Medical College, Pabna, Bangladesh.
3. Netrokona Medical College, Netrokona, Bangladesh.
4. Nilphamari Medical College, Nilphamari, Bangladesh.
5. TMSS Medical College, Bogura, Bangladesh.
6. Mugda Medical College, Dhaka, Bangladesh.
7. Department of Hygiene, Sapporo Medical University School of Medicine, Sapporo, Japan.