1. Department of Microbiology and Immunology, College of Medicine and Health Sciences Sultan Qaboos University Al Khoudh Sultanate of Oman
2. Department of Microbiology Suhar Hospital Sohar Sultanate of Oman
3. Department of Family Medicine and Public Health College of Medicine and Health Sciences Sultanate of Oman Alkoudh Sultanate of Oman
4. Department of Biostatistics Christian Medical College Vellore Tamil Nadu India