Zirk-Sadowski Jan, Masoli Jane A, Strain W David, Delgado Joao, Henley William, Hamilton Willy, Melzer David, Ble Alessandro
Epidemiology and Public Health, Institute of Biomedical and Clinical Science, University of Exeter Medical School, Exeter, UK.
Am J Gastroenterol. 2017 Mar;112(3):520-523. doi: 10.1038/ajg.2016.584.