We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleDesign of treatment trials for functional gastrointestinal disorders.AuthorsVeldhuyzen van Zanten, S J; Talley, N J; Bytzer, P; Klein, K B; Whorwell, P J; Zinsmeister, A RPublicationGut, 1999, Vol 45, Issue Supplement, pII69ISSN0017-5749Publication typearticle