?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Staniforth%2C+David+Harold&rft.aufirst=David+Harold&rft.aulast=Staniforth&rft.date=1997&rft.tpages=276&rft.title=A+development+of+some+simple+measures+for+assessing+gastrointestinal+transit+in+clinical+pharmacology+with+special+reference+to+variability+and+validity&rft.inst=UCL+(University+College+London)&rft.degree=Doctoral