Hi Jules, and thanks for your post - you have brought up an excellent concern! I see my colleague, , has already provided an excellent response and even a link to an article we have published, right here on COPD.net (thanks, John!)
When you have an opportunity, I hope you will look through the material. Should you have any additional questions or concerns, please let me or any other moderator / team member know, and we will be happy to try to assist you further.
Wishing you well,
Leon (site moderator COPD.net)