1. Department of Microbiology, Mymensingh Medical College, Mymensingh, Bangladesh.
2. Department of Biochemistry, Manikganj Medical College, Manikganj, Bangladesh.
3. Department of Hygiene, Sapporo Medical University School of Medicine, Sapporo, Japan.
4. Department of Biomedical Sciences, Ross University School of Veterinary Medicine, St. Kitts, West Indies.