A 4-Year Trial of Tiotropium in Chronic Obstructive Pulmonary Disease

Tashkin, Donald P ; Celli, Bartolome ; Senn, Stephen ; Burkhart, Deborah ; Kesten, Steven ; Menjoge, Shailendra ; Decramer, Marc

The New England journal of medicine, 2008-10, Vol.359 (15), p.1543-1554 [Periódico revisado por pares]

Boston, MA: Massachusetts Medical Society

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