We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleThe role of observational investigations in comparative effectiveness research.AuthorsMarko NF; Weil RJPublicationValue in health : the journal of the International Society for Pharmacoeconomics and Outcomes Research, 2010, Vol 13, Issue 8, p989ISSN1524-4733Publication typearticleDOI10.1111/j.1524-4733.2010.00786.x