Respiratory Medicine · 2010 · 16 citations · 16 references
Cardiovascular DiseasePulmonary MedicineIpratropium Bromide/albuterolMedicineAnesthesiology
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Martin R. Miller, J. Hankinson, Vito Brusasco et al. · European Respiratory Journal · 2005 · 15.4K citations · Full text
A 4-Year Trial of Tiotropium in Chronic Obstructive Pulmonary Disease
Donald P. Tashkin, Bartolomé R. Celli, Stephen Senn et al. · New England Journal of Medicine · 2008 · 2.2K citations · Full text