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Yang Z, Lönnerdal B, Adu-Afarwuah S, Brown KH, Chaparro CM, Cohen RJ, Domellöf M, Hernell O, Lartey A, Dewey KG.Yang Z, et al.Am J Clin Nutr. 2009 May;89(5):1433-40. doi: 10.3945/ajcn.2008.26964. Epub 2009 Mar 18.Am J Clin Nutr. 2009.PMID: 19297460Free article.