Nguyen, Bui Thai Huy, Hoang Phuong Tran, Nguyen Tra Uyen Ho, Thai Nguyen Ma, Tin Nghia Tran, Thi Thao Linh Nguyen, and Duy Linh Nguyen. “Unusual Concurrent HBsAg and Anti-HBs Positivity in Chronic Hepatitis B With Compensated Cirrhosis”. European Journal of Case Reports in Internal Medicine 13, no. 1 (December 23, 2025). Accessed November 3, 2026. https://ejcrim.com/index.php/ejcrim/article/view/6007.