Development and Validation of a Quantitative LC-MS/MS Analytical Method for the Simultaneous Detection of Isotretinoin and Nifedipine in Plasma: A Comprehensive Study on Calibration, Specificity, and Performance. pubs bcnf. 2025;2(7). Accessed February 20, 2026. https://pubs.bcnf.ir/index.php/Articles/article/view/545