Am J Gastroenterol advance online publication 24 May 2011; doi:10.1038/ajg.2011.162
Reference 16 for the following paper should read:
Simrén M, Bajor A, Gillberg P-G et al. Randomised clinical trial: the ileal bile acid transporter inhibitor A3309 vs. placebo in patients with chronic idiopathic constipation—a double-blind study. Aliment Pharmacol Ther 2011;34:41–50.