Enhancing ECG Classification in Cardiac Diagnostics: A Novel Approach Using Adaptive Focal Cross-Entropy Loss Function. - Happy Nkanta Monday; Grace Ugochi Nneji; Md Altab Hossin; Kelvin Mark Davies-Mark; Edwin Sunday Umana; Goodness Temofe Mgbejime; Jianping Li 002 (IEEE J. Biomed. Health Informatics, 2025)