We regret that several typographical errors were introduced to the final published version of this article. The term PACO2 (to indicate alveolar carbon dioxide tension) was presented incorrectly as PaCO2 (used in the article to indicate arterial carbon dioxide tension).
Also, the second equation on page 1705 was presented incorrectly aswhich should have read
The online version of the article has been amended to correct these errors.
- Copyright ©ERS 2015