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Original Investigation |  FREE
Hajime Yamagata, MD; Yutaka Kiyohara, MD; Kunihiko Aoyagi, MD; et al.
Arch Intern Med. 2000;160(13):1962-1968. doi:10.1001/archinte.160.13.1962.

Editor's Correspondence | 
Massimo Rugge, MD; Mauro Cassaro, MD; Genesio Leo, MD; et al.
Arch Intern Med. 1999;159(20):2483-2484. doi:.

Original Investigation |  FREE
A. Mark Fendrick, MD; Michael E. Chernew, PhD; Richard A. Hirth, PhD; et al.
Arch Intern Med. 1999;159(2):142-148. doi:10.1001/archinte.159.2.142.

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