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Puckett JG, Daniels KE.Puckett JG, et al. Among authors: daniels ke.Phys Rev Lett. 2013 Feb 1;110(5):058001. doi: 10.1103/PhysRevLett.110.058001. Epub 2013 Jan 31.Phys Rev Lett. 2013.PMID: 23414047