Williams VSL, Nelson LM, Carson RT, Baird MJ, Coon CD, Fehnel SE, Johnston JM. Factor analyses of patient-reported outcome measures in Irritable Bowel Syndrome with Constipation (IBS-C): results from two randomized, double-blind, placebo-controlled phase 3 trials of linaclotide. Presented at the 2012 ACG Annual Meeting and Postgraduate Course; September 1, 2012. Previously presented at the Joint International Neurogastroenterology and Motility Meeting.