We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleThe urgent need to recommend an intake of vitamin D that is effective.AuthorsVieth, Reinhold; Bischoff-Ferrari, Heike; Boucher, Barbara J.PublicationAmerican Journal of Clinical Nutrition, 2007, Vol 85, Issue 3, p649ISSN0002-9165Publication typearticle