Citation counts are provided from Web of Science and CrossRef. The counts may vary by service, and are reliant on the availability of their data. Counts will update daily once available.
This article is in the 43rd percentile (ranked 209,492nd) of the 396,175 tracked articles of a similar age in all journals and the 54th percentile (ranked 31st) of the 73 tracked articles of a similar age in BMC Pulmonary Medicine
View more on Altmetric
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.