. 2016 Jul 15;44(6):554–567. doi: 10.1111/apt.13736
© 2016 The Authors. Alimentary Pharmacology & Therapeutics published by John Wiley & Sons Ltd.
This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Figure 1.
Flow chart for studies included in this review.