Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

Filters

My NCBI Filters

Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
2008 1
2011 1
2012 1
2024 0

Text availability

Article attribute

Article type

Publication date

Search Results

3 results

Results by year

Filters applied: . Clear all
Page 1
Incentive spirometry: 2011.
Restrepo RD, Wettstein R, Wittnebel L, Tracy M. Restrepo RD, et al. Among authors: wittnebel l. Respir Care. 2011 Oct;56(10):1600-4. doi: 10.4187/respcare.01471. Respir Care. 2011. PMID: 22008401 Free article.
Medication adherence issues in patients treated for COPD.
Restrepo RD, Alvarez MT, Wittnebel LD, Sorenson H, Wettstein R, Vines DL, Sikkema-Ortiz J, Gardner DD, Wilkins RL. Restrepo RD, et al. Among authors: wittnebel ld. Int J Chron Obstruct Pulmon Dis. 2008;3(3):371-84. doi: 10.2147/copd.s3036. Int J Chron Obstruct Pulmon Dis. 2008. PMID: 18990964 Free PMC article. Review.