Comparison Of Skin To Epidural Space Distance Using BMI-Derived Predictive Equation Versus Ultrasound Guidance In Elective Surgery Patients: A Prospective Randomized Study. International Journal of Environmental Sciences, [S. l.], p. 1307–1316, 2025. DOI: 10.64252/8zvb3237. Disponível em: https://theaspd.com/index.php/ijes/article/view/3076.. Acesso em: 10 mar. 2026.