RA cause COPD?

I read somewhere that since RA was an autoimmune disorder it can cause COPD.  I wanted to go back and read the article again but I couldn't find it.  I was wondering if it could be true.  

[Dr. Kokil Mathur]

Hi!

Well, recent research is pointing towards an autoimmune component in COPD. However, this component is thought to be triggered by smoking. So, if you are a smoker then yes, you can have an autoimmune component to COPD. Once you have an autoimmune disease, others can co-exist. However, RA does not cause COPD.
Hope this helps. Take care!