Gani, Rino A., A. D. Handayu, Reny Mulatsih, L. A. Lesmana, Ali Sulaiman, and Nurul Akbar. 2005. “Genotyping of Hepatitis B Virus from Dried and Stored Serum on Filter Paper”. Medical Journal of Indonesia 14 (4), 215-19. https://doi.org/10.13181/mji.v14i4.198.