1. ICMR—National Institute of Cholera and Enteric Disease, Kolkata 700010, India
2. R. G Kar Medical College & Hospital, Kolkata 700004, India
3. College of Medicine and Sagar Dutta Hospital, Kolkata 700058, India
4. Medical College & Hospital, Kolkata 700073, India
5. West Bengal State AIDS Prevention & Control Society, Kolkata 700091, India
6. Indian Council of Medical Research, New Delhi 110029, India