Apparent Increase in COPD Mortality Likely an Artifact of Changes in Documentation and Coding
1972 ◽
Vol 30
◽
pp. 568-569
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1970 ◽
Vol 245
(19)
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pp. 5007-5011
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2011 ◽
Vol 286
(29)
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pp. 26166-26177
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1979 ◽
Vol 30
(4)
◽
pp. 513-517
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1735 ◽
Vol 39
(444)
◽
pp. 390-392
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Keyword(s):
Keyword(s):
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