Christoffel Tampubolon , G. ., Siregar, O. and Andriandi (2023) “Association between Serum Alp Levels and Pre- Operative LDH towards Clinical Prognosis of Osteosarcoma Patients in H. Adam Malik Hospital, Medan”, Sumatera Medical Journal, 6(1), pp. 11–19. doi: 10.32734/sumej.v6i1.8991.