Mangel AW, Fehnel SE. End points in irritable bowel syndrome. Expert Rev Gastroenterol Hepatol. 2011 Jun 1;5(3):293-5.
Keenan A-M, McKenna SP, Doward LC, Conaghan PC, Emery P, Tennant A. OAQoL: development and preliminary validation of a needs-based quality of life measure for osteoarthritis. Poster presented at the American College of Rheumatology 2007 Annual Scientific Meeting; April 2007. Chicago, IL. [abstract] Rheumatology (Oxford). 2007; 46:162-3.