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Ramadhini, D., Ritonga, N., Siregar, Y.F. and Aswan, Y. 2021. The Effect of Health Education by Using Leaflet Media to Increase the Knowledge of Hypertension Patients in Outpatients At South Tapanuli District Hospital: The Effect of Health Education by Using Leaflet Media to Increase the Knowledge of Hypertension Patients in Outpatients At South Tapanuli District Hospital. Jurnal Kesehatan Ilmiah Indonesia / Indonesian Health Scientific Journal. 6, 1 (Jul. 2021), 121–125. DOI:https://doi.org/10.51933/health.v6i1.417.