1. Interpreting Hepatitis B Surface Antigen Levels: Useful Clinical Test or Just Another Confusing Assay? 
Brian J. McMahon, MD, Brenna C. Simons, PhD 
Clinical Gastroenterology and Hepatology 
Volume 10, Issue 3, Pages (March 2012)
DOI: /j.cgh
Copyright © 2012 AGA Institute Terms and Conditions

2. Figure 1
The evolution of progression through the phases of chronic hepatitis B virus infection.
Clinical Gastroenterology and Hepatology  , DOI: ( /j.cgh )
Copyright © 2012 AGA Institute Terms and Conditions