title: Retraction: "Chronic constipation-associated symptoms in Asians and non-Asians, and effects of 12-week prucalopride treatment: A pooled analysis of 4 randomized, placebo-controlled trials" by Suck Chei CHOI, Duo Wu ZOU, Mei Yun KE, Somchai LEELAKUSOLVONG, Jan TACK, Eamonn MM QUIGLEY, Andy LIU and Jin Yong KIM.