Anyone who has a + PPD test should read!# Medicine - 求医问药
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http://www.annals.org/cgi/content/full/122/12/955
Tuberculosis
Yesterday, Today, and Tomorrow
15 June 1995 | Volume 122 Issue 12 | Pages 955-956
Tuberculosis
Yesterday, Today, and Tomorrow
15 June 1995 | Volume 122 Issue 12 | Pages 955-956