We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleEfficacy and safety of butterbur herbal extract Ze 339 in seasonal allergic rhinitis: postmarketing surveillance study.AuthorsKäufeler R; Polasek W; Brattström A; Koetter UPublicationAdvances in therapy, 2006, Vol 23, Issue 2, p373ISSN0741-238xPublication typearticleDOI10.1007/BF02850143