1. Case definitions for acute hepatitis C virus infection: A systematic review 
Behzad Hajarizadeh, Jason Grebely, Gregory J. Dore 
Journal of Hepatology 
Volume 57, Issue 6, Pages (December 2012)
DOI: /j.jhep
Copyright © 2012 European Association for the Study of the Liver Terms and Conditions

2. Fig. 1
Criteria used to categorize selected studies based on the main objectives of the studies.
Journal of Hepatology  , DOI: ( /j.jhep )
Copyright © 2012 European Association for the Study of the Liver Terms and Conditions

3. Fig. 2 Flow diagram detailing review process and study selection.
Journal of Hepatology  , DOI: ( /j.jhep )
Copyright © 2012 European Association for the Study of the Liver Terms and Conditions

4. Fig. 3
Heterogeneity in case definitions for recent HCV infection among the studies using HCV antibody seroconversion or ALT elevation as a case definition criterion. (A) Window period of HCV exposure (the time between the last negative antibody test and the first positive antibody test) in 131 studies using HCV antibody seroconversion for case definition of recent HCV infection; (B) ALT level threshold in 115 studies using ALT elevation for case definition of recent HCV infection. ULN, the upper limit of normal.
Journal of Hepatology  , DOI: ( /j.jhep )
Copyright © 2012 European Association for the Study of the Liver Terms and Conditions

5. Journal of Hepatology 2012 57, 1349-1360DOI: (10. 1016/j. jhep. 2012
Copyright © 2012 European Association for the Study of the Liver Terms and Conditions