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Publisher
- "prof. marin drinov" publishing house of bulgarian academy of sciences1
- african field epidemiology network1
- akademiai kiado2
- akademiai kiado zrt.1
- asociatia pentru cresterea vizibilitatii cercetarii stiintifice (acvcs)3
- babol university of medical sciences2
- balkan military medical committee2
- centers for disease control & prevention (cdc)2
- centers for disease control and prevention (cdc)1