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Formulation of Gastroretentive Microballoons of Metoprolol Succinate Using Acetylated Cocoyam (Xanthosoma sagittifolium) Starch as a Sustained Release Polymer. East Cent. Afr. J. Pharm. Sci. 2023;25(1):17-30. Accessed June 14, 2026. http://jsep.uonbi.ac.ke/ojs/index.php/ecajps/article/view/1455