1. Department of Otorhinolaryngology‐Head and Neck Surgery Tribhuvan University Teaching Hospital Kathmandu Nepal
2. Department of Internal Medicine Tribhuvan University Teaching Hospital Kathmandu Nepal
3. Maharajgunj Medical Campus Tribhuvan University Institute of Medicine Kathmandu Nepal
4. Department of Pathology Maharajgunj Medical CampusTribhuvan University Institute of Medicine Kathmandu Nepal