We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleClinical trial design in chronic obstructive pulmonary disease: current perspectives and considerations with regard to blinding of tiotropium.AuthorsBeeh KM; Beier J; Donohue JFPublicationRespiratory research, 2012, Vol 13, p52ISSN1465-993xPublication typearticleDOI10.1186/1465-9921-13-52