Wahyuni Tarigan , S., Frimpong Oppong, R., Lubis, J., Pakpahan, R. and Doortua, D. 2021. DIFFERENCES IN BLOOD GLUCOSE LEVELS BY USING EDTA’S SERUM AND PLASMA WAS EXAMINED IMMEDIATELY AND POSTPONED 2 HOURS AT EFARINA BERASTAGI HOSPITAL. International Conference on Health Science, Green Economics, Educational Review and Technology. 3, 1 (Dec. 2021), 213–222. DOI:https://doi.org/10.54443/ihert.v3i.120.