1. Clinical Center of Serbia, Clinic for Infectious and Tropical Diseases, Belgrade Faculty of Medicine, Belgrade, Serbia
2. Jevremova Special gynecology hospital with maternity, Belgrade, Serbia
3. Institute for Students’ Healthcare, Belgrade, Serbia
4. Institute of Health Care of Workers of the Ministry of Internal Affairs, Belgrade, Serbia
5. Clinical Center of Serbia, Clinic for Pulmonology, Belgrade, Serbia
6. General Hospital Vrsac, Belgrade, Serbia
7. Institute of Virology, Vaccines and Sera “Torlak”, Belgrade, Serbia
8. The World Health Organization, Geneva, Switzerland
9. PATH Switzerland, Geneva, Switzerland
10. PATH US, Seattle, WA, USA
11. PATH US, Washington DC, USA
12. PATH India, 15th Floor, Dr Gopal Das Bhawan, 28, Barakhamba Road, Connaught Place, New Delhi, Delhi 110001, India