%0 Journal Article %T Assessment and Control for Confounding by Indication in Observational Studies %A Psaty, Bruce M. %A Koepsell, Thomas D. %A Lin, Danyu %A Weiss, Noel S. %A Siscovick, David S. %A Rosendaal, Frits R. %A Pahor, Marco %A Furberg, Curt D. %J Journal of American Geriatrics Society %V 47 %N 6 %@ 0002-8614 %D 1999-06-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve