Ismailova, Chijdem, Elica Golkocheva-Markova, Tencho Tenev, and Stefka Krumova. “THE USE OF DRIED BLOOD SPOTS FOR MEASURING THE IMMUNITY AGAINST HBV: THE SIGNIFICANCE OF ANTIBODY DILUTION”. PROBLEMS of Infectious and Parasitic Diseases 47, no. 1 (June 27, 2019): 16–20. Accessed September 8, 2024. https://pipd.ncipd.org/index.php/pipd/article/view/47_1_3_USE_OF_DRIED_BLOOD_SPOTS_FOR_MEASURING_THE_IMMUNITY_AGAIN.