RT Journal Article SR Electronic T1 Increased κ-opioid receptor expression and function during chronic visceral hypersensitivity JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1199 OP 1200 DO 10.1136/gutjnl-2013-306240 VO 63 IS 7 A1 Patrick A Hughes A1 Joel Castro A1 Andrea M Harrington A1 Nicole Isaacs A1 Melissa Moretta A1 Gareth A Hicks A1 David M Urso A1 Stuart M Brierley YR 2014 UL http://gut.bmj.com/content/63/7/1199.abstract AB