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Chen Z, Calhoun VD.Chen Z, et al.Concepts Magn Reson Part B Magn Reson Eng. 2010 Aug 1;37B(3):129-145. doi: 10.1002/cmr.b.20164.Concepts Magn Reson Part B Magn Reson Eng. 2010.PMID: 20890375Free PMC article.