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Research Letter |  FREE
German Morís, MD; Juan Carlos Garcia-Monco, MD
JAMA Intern Med. 2014;174(9):1511-1512. doi:10.1001/jamainternmed.2014.2918.

Viewpoint | 
Steven H. Horowitz, MD
JAMA Intern Med. 2013;173(16):1493-1494. doi:10.1001/jamainternmed.2013.8409.

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