Updated upper limit of normal for serum alanine aminotransferase value in Vietnamese population oleh Nguyen Tien Huy, Tieu Minh Thuan, Nguyen Thi Cam Huong, Sedighe Karimzadeh, Nguyen Thi Thanh, Ghada Mohamed Sabbah, Khaled Ismaeil, Dang Nguyen Trung An, Lai To Huong, Pham Thi Le Hoa