Ferraz, M. L. G., Silva, A. E., Yamamoto, M., & Guimaråes, R. X. (1992). Hepatitis B vaccine - proposal for a standardized assessment of immune response . Revista Do Instituto De Medicina Tropical De São Paulo, 34(2), 137-140. https://www.revistas.usp.br/rimtsp/article/view/28907