Sari, Dina Keumala, Alexander Parlindungan Marpaung, Parluhutan Siagian, and Nurfida Khairina Arrasyid. 2019. “Vitamin A Supplementation in Pulmonary Tuberculosis Patients on Acceleration of Sputum Conversion in Medan City”. Open Access Macedonian Journal of Medical Sciences 7 (20):3505-8. https://doi.org/10.3889/oamjms.2019.688.