| 1 (744) | Russian Academy of Medical Sciences | RUS |  |
| 2 (1196) | Hematological Scientific Centre of the Russian Academy of Medical Sciences | RUS | |
| 3 (1451) | Motol University Hospital | CZE | |
| 4 (1541) | Ljubljana University Medical Centre | SVN | |
| 5 (1978) | National Institute of Public Health, Czech Republic | CZE | |
| 6 (2046) | University Hospital Brno | CZE | |
| 7 (2111) | Almazov National Medical Research Centre | RUS | |
| 8 (2237) | Ministry of Health of the Russian Federation | RUS | |
| 9 (2251) | Federal Medical Biological Agency * | RUS | |
| 10 (2269) | Institute of Epidemiology and Microbiology of the Russian Academy of Medical Sciences | RUS | |
| 11 (2308) | Russian Medical Academy of Continuous Professional Education | RUS | |
| 12 (2337) | University Hospital Centre Zagreb | HRV | |
| 13 (2419) | Clinical Center of Serbia | SRB | |
| 14 (2437) | Clinical Hospital Dubrava | HRV | |
| 15 (2553) | Institute of Experimental Medicine of the NorthWest Branch of the Russian Academy of Medical Sciences | RUS | |
| 16 (2616) | Clinical Hospital Centre Rijeka | HRV | |
| 17 (2633) | I. Mechnikov Research Institute of Vaccines and Sera of the Russian Academy of Medical Sciences | RUS | |
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