Napitupulu , Partogi, Gupita Nareswari, Mulia Rahmansyah, and Tandy Chintya Tanaji. 2022. “Radiographic Lumbosacral Angle Has a Low Yield for Diagnosing Low Back Pain in Workers 20-70 Years of Age”. Universa Medicina 41 (3):263-70. https://doi.org/10.18051/UnivMed.2022.v41.263-270.