Metoprolol for the Prevention of Acute Exacerbations of COPD.
N Engl J Med. 2019 Dec 12;381(24):2304-2314. doi: 10.1056/NEJMoa1908142. Epub 2019 Oct 20.
N Engl J Med. 2019.
PMID: 31633896
Free PMC article.
Clinical Trial.