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Original Investigation | 
Danilo Di Bona, MD, PhD; Antonella Plaia, PhD; Maria Stefania Leto-Barone, MD, PhD; et al.
JAMA Intern Med. 2015;175(8):1301-1309. doi:10.1001/jamainternmed.2015.2840.
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Research Letters |  FREE
Jeremy D. Keenan, MD, MPH; Paul M. Emerson, PhD; Bruce D. Gaynor, MD; et al.
JAMA Intern Med. 2013;173(9):821-823. doi:10.1001/jamainternmed.2013.3041.

Review Article |  FREE
John R. Ebright, MD; Mitchell T. Pace, MD; Asher F. Niazi, MD
Arch Intern Med. 2001;161(22):2671-2676. doi:10.1001/archinte.161.22.2671.

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