Controlled Trial of Budesonide-Formoterol as Needed for Mild Asthma.
N Engl J Med. 2019 May 23;380(21):2020-2030. doi: 10.1056/NEJMoa1901963. Epub 2019 May 19.
N Engl J Med. 2019.
PMID: 31112386
Clinical Trial.