Ben J Witteman

Same-admission versus interval cholecystectomy for mild gallstone pancreatitis (PONCHO): a multicentre randomised controlled trial

M. Boermeester, C. Dejong, M. Dijkgraaf, 2015, The Lancet.

Urgent endoscopic retrograde cholangiopancreatography with sphincterotomy versus conservative treatment in predicted severe acute gallstone pancreatitis (APEC): a multicentre randomised controlled trial

F. Vleggaar, P. Fockens, R. V. D. van der Hulst, 2020, The Lancet.