“…For the purposes of this review, we defined largediameter balloon as Ն12 mm. Studies were excluded for the following reasons: editorial letter, 25 balloon dilation diameter less than 12 mm, [26][27][28][29] and preliminary reports when final results were available. 20 The following data were extracted: patient demographic characteristics, study design, largest stone size, size of endoscopic sphincterotomy, prior endoscopic sphincterotomy, balloon diameter, initial success rate, final success rate, number of sessions needed for complete biliary stones removal, need for mechanical lithotripsy, and rates of adverse events.…”