Haider, A., Tareen, H. ullah and Syed, F.O. 2024. Frequency and risk factors of postoperative hyponatremia in primary hip and knee arthroplasties patients at a tertiary care hospital, Karachi, Pakistan. Journal of Postgraduate Medical Institute. 38, 3 (Sep. 2024). DOI:https://doi.org/10.54079/jpmi.38.3.3366.