Vitamin A equivalency estimatesunderstanding apparent differencesHaskell, Marjorie JBrown, Kenneth HAuthor informationProgram in International Nutrition and Department of Nutrition University of California, Davis One Shields Avenue Davis, CA 95616E-mail: [email protected]The authors had no conflict of interest to report.The American Journal of Clinical Nutrition 81(4):p 945-946, April 2005.Copyright © 2013 by the American Society for Nutrition