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O'Horo JC, Jones A, Sternke M, Harper C, Safdar N.O'Horo JC, et al.Mayo Clin Proc. 2012 Jul;87(7):643-51. doi: 10.1016/j.mayocp.2012.02.024.Mayo Clin Proc. 2012.PMID: 22766084Free PMC article.Review.