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<p>Dear PRad collaborators,</p>
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<p> In the attachment, I have prepared an abstract for the APS April meeting in Washington DC. The abstract is very similar to the one I submitted for the SPIN 2016 symposium. </p>
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<p> I apologize for the last-minute notice. Please let me know if you have any suggestion or comments. </p>
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<p> Thank you very much.</p>
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<p>Weizhi</p>
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