(Q44248567)
Statements
1 reference
Tiotropium versus salmeterol for the prevention of exacerbations of COPD. (English)
1 reference
Claus Vogelmeier
1 reference
Bettina Hederer
1 reference
Thomas Glaab
1 reference
Hendrik Schmidt
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Maureen P M H Rutten-van Mölken
1 reference
Kai M Beeh
1 reference
Klaus F Rabe
1 reference
POET-COPD Investigators
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1 March 2011
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Identifiers
1 reference