Bambang Toto Riyanto, Burhanuddin Nasution, Syafrizal Nasution & Nindia Sugih Arto, “COMPARISON OF GAMMA GLUTAMYL TRANSFERASE SERUM LEVELS IN PATIENTS WITH 5D CHRONIC KIDNEY DISEASES WITH STADIUM 3 AND 4 CHRONIC KIDNEY DISEASE”, IJRSM, vol. 7, no. 4, pp. 1–7, Apr. 2020.