Muhammad Farhan Maulana, Lalu Srigede, Lale Budi Kusuma Dewi, & Ari Khusuma. (2026). Urine Analysis Based on Sampling Time in Tramadol Abusers. Journal of Indonesia Laboratory Students (JILTS), 5(2). https://doi.org/10.32807/jilts.v5i2.492