URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/seroconversion-and-dynamics-of-igg-anti-sars-cov-2-antibodies-during-the-pandemic--a-two-month-observation-cohort-study-on-the-population-of-dcfcd07e645d245babe887e5e2daa016/f7a75c84-03a5-11f0-ae8a-e4434b0aa6de
