Zhao, Xing, Rajina Sahi, Yu-Yang Zhao, Jun Wang, and Chun- Hui Li. 2015. “Expressions of HPV 16-E6 in Esophageal Carcinoma and it’s Clinical Significance”. Asian Journal of Medical Sciences 6 (6):39-42. https://doi.org/10.3126/ajms.v6i6.12537.