Highly sensitive assay for tiotropium, a quaternary ammonium, in human plasma by high-performance liquid chromatography/tandem mass spectrometry

2007 ◽  
Vol 21 (11) ◽  
pp. 1755-1758 ◽  
Author(s):  
Jiang Wang ◽  
Yao Jiang ◽  
Yingwu Wang ◽  
Hao Li ◽  
J. Paul Fawcett ◽  
...  
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