Marpaung, A., Siagian, P., & Sari, D. 2018 Oct 30. Influence of Vitamin A Supplementation in Medication of Pulmonary TB Patients on Acceleration of Sputum Conversion in Intensive Phase in The Working Area of Medan Kota Sub District Puskesmas. JURNAL ILMU KEFARMASIAN INDONESIA. [Online] 16:2