Vitamin D levels do not predict the stage of hepatic fibrosis in patients with non-alcoholic fatty liver disease: A PRISMA compliant systematic review and meta-analysis of pooled data

Table 7 Methodology for grading of hepatic fibrosis utilized by the authors of the six included studies

Study	Fibrosis stage used
Anty et al[27], 2016	Kleiner et al[53], 2005
Barchetta et al[28], 2012	Brunt et al[54], 1999
Bril et al[29], 2015	Kleiner et al[53], 2005
Luger et al[30], 2016	Kleiner et al[53], 2005
Patel et al[32], 2016	Kleiner et al[53], 2005
Targher et al[26], 2007	Brunt et al[54], 1999