Zavhorodnii A, Bilushko V, Paliy A, Kalashnyk M, Kalashnyk N, Paliy A. Freeze-Drying Improved the Stability of Tuberculin Purified Protein Derivative (PPD) in Mammals. Probl Cryobiol Cryomed [Internet]. 2022Jun.3 [cited 2024Apr.26];32(1):63–67. Available from: http://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1780