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Comparison Of Skin To Epidural Space Distance Using BMI-Derived Predictive Equation Versus Ultrasound Guidance In Elective Surgery Patients: A Prospective Randomized Study. Int. J. Environ. Sci. [Internet]. 2025 Jun. 2 [cited 2026 Mar. 10];:1307-16. Available from: https://theaspd.com/index.php/ijes/article/view/3076