%0 Generic %B Therap Adv Gastroenterol %D 2011 %P 343-63 %R 10.1177/1756283x11417483 %T The LUCK study: Laxative Usage in patients with GP-diagnosed Constipation in the UK, within the general population and in pregnancy. An epidemiological study using the General Practice Research Database (GPRD) %V 4