1. Apollo Institute of Medical Sciences and Research, Hyderabad, India.
2. Department of Microbiology, Amrita Institute of Medical Sciences, Kochi, India.
3. Infectious Disease Training and Research Center, Christian Medical College, Vellore, India.
4. Department of Community Medicine, Christian Medical College, Vellore, India.
5. Department of Microbiology, Christian Medical College, Vellore, India.