DNA extraction from long-term preserved formalin-fixed paraffin-embedded samples of thymic epithelial tumours – a performance comparison of three commercial kits - Le, Duc; Nguyen, Thi; Dang, Thanh; Tran, Ngoc; Nguyen, Ngoc; Dang, Thai; Nguyen, Thu; Nguyen, Huy; Nguyen, Duc; Do, Thi (Contemporary Oncology/Współczesna Onkologia, 2025)