-, Annisa, Universitas Sumatera Utara dan Universitas Muhammadiyah Sumatera Utara, Indonesia

• International Conference on Tropical Medicine and Infectious Diseases (ICTROMI) 2017 - General Paper
  Protection Status Against Hepatitis B Infection Assessed from Anti-HBs Level, History of Vaccination, History of Infection Based on Anti-HBc in Medical Students
  Abstract