Journal article
Formoterol in addition to tiotropium improved airflow obstruction in chronic obstructive pulmonary disease.
Authors
Schünemann HJ
Journal
Annals of Internal Medicine, Vol. 145, No. 2,
Publisher
American College of Physicians
Publication Date
September 1, 2006
DOI
10.7326/acpjc-2006-145-2-039
ISSN
1056-8751