Ursodeoxycholic acid for the prevention of symptomatic gallstone disease after bariatric surgery: statistical analysis plan for a randomised controlled trial (UPGRADE trial).
Sylke HaalMaimoena S S GumanL Maurits de BrauwRuben N van VeenRuben SchoutenPaul FockensVictor E A GerdesMarcel G W DijkgraafRogier P VoermansPublished in: Trials (2020)
The Netherlands Trial Register NL5954 . Registered on 21 November 2016.