1. National Institute of Virology Mumbai Unit Haffkine Institute Compound Mumbai India
2. WHO‐National Polio Surveillance Project New Delhi India
3. Department of Microbiology National Polio Laboratory, B. J. Medical College Ahmedabad India
4. Department of Virology King Institute of Preventive Medicine and Research Guindy Chennai India
5. Department of Microbiology Sanjay Gandhi Postgraduate Institute of Medical Sciences (SGPGIMS) Lucknow India