Marushko , Y.V., T.V. Hyshchak, and Y.I. Todyka. 2021. “PROPHYLACTIC EFFECT OF A PROBIOTIC INTERVENTION IN CHILDREN PRONE TO ACUTE UPPER RESPIRATORY TRACT INFECTIONS: A RANDOMIZED CONTROLLED TRIAL ”. Medical Science of Ukraine (MSU) 17 (3), 51-65. https://doi.org/10.32345/2664-4738.3.2021.06.