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Effects of theophylline and ipratropium bromide on exercise performance in patients with stable chronic obstructive pulmonary disease
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Jan 2000143
Feb 2000273
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Dec 2000638
Jan 20013106
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Apr 2001250
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Jun 20012111
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Aug 2001342
Sep 20010100
Oct 20012101
Nov 2001453
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Apr 2010652
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Sep 2013792
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Dec 202012113
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Feb 2021882
Mar 202112115
Apr 202111114
May 202111114
Jun 202111110
Jul 2021335
Total249727721155