title: Understanding the multidimensional nature of illness severity as measured by patient-reported outcome measures in irritable bowel syndrome.
authors.forename: Lin
authors.initials: L
authors.lastname: Chang
mesh_terms: D016903:Drug Monitoring / Q000379:methods* / Q000523:psychology*; D005260:Female; D006801:Humans; D043183:Irritable Bowel Syndrome / Q000523:psychology* / Q000628:therapy*; D008297:Male; D012720:Severity of Illness Index