Does anyone have experience climbing with someone who has cystic fibrosis? 
  
I have a friend with cystic fibrosis who wants to climb some of the PNW volcanoes this year.  Of course, he will consult his doctor, but I am wondering if the community has had experience with this that they would be willing to share.  I really want to see him achieve his goals safely and enjoyably. 
  
Specifically, is this a feasible goal?  Are there special precautions that must be taken at altitude?  Are there steps that can be taken to increase the likelihood of success? 
  
Thanks for the help.