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Alter DA, Ko DT, Tu JV, Stukel TA, Lee DS, Laupacis A, Chong A, Austin PC.Alter DA, et al. Among authors: laupacis a.J Gen Intern Med. 2012 Sep;27(9):1171-9. doi: 10.1007/s11606-012-2072-y. Epub 2012 May 2.J Gen Intern Med. 2012.PMID: 22549300Free PMC article.Clinical Trial.
van Walraven C, Laupacis A, Seth R, Wells G.van Walraven C, et al. Among authors: laupacis a.CMAJ. 1999 Feb 9;160(3):319-26.CMAJ. 1999.PMID: 10065073Free PMC article.Clinical Trial.