J. L. Fernandez-Luque, P. Maurtua-Mamani, S. Estrella-Quito, and J. A. Grández-Urbina, “HOW DO I CHECK THE RESULT OF VACCINATION AGAINST VIRAL HEPATITIS B IN PERU?, A RESEARCH STUDY TO MAKE”, Rev.Fac.Med.Hum, vol. 18, no. 2, Apr. 2018.