1. Effect of metformin on serum visfatin levels in patients with polycystic ovary syndrome 
Mesut Ozkaya, Assistant Professor, Erman Cakal, Specialist, Yusuf Ustun, Associate Professor, Yaprak Engin-Ustun, Associate Professor 
Fertility and Sterility 
Volume 93, Issue 3, Pages (February 2010)
DOI: /j.fertnstert
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Receiver operating characteristic curve for visfatin. The best cut-off value that discriminates women with increased diabetogenic risk from others is 19.2 ng/mL, with a sensitivity of 93.3% and a specificity of 84%.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions