Review Article

Endoscopic Papillary Large Balloon Dilation Reduces the Need for Mechanical Lithotripsy in Patients with Large Bile Duct Stones: A Systematic Review and Meta-Analysis

Table 2

The Newcastle-Ottawa quality assessment in retrospective studies.

Study (year) SelectionComparability Outcome/exposure

Itoi (2009) ********
Hong GY (2009) ***N/A**
Kim TH (2011) ********
Rosa (2013) ********