These are links with good quality information that I have found to be reliable over the years. There is a lot of poor information out there, so please take care. If you don't know who wrote the site, if it is sponsored by a pharmaceutical company or is written by a practitioner seeking to sell you any particular kind of therapy (drug or complementary) then please be very sceptical about the content. Please also beware that there are a lot of personal web sites like this one - what is right for one person with CF can be very wrong for another and don't change any of your treatment without consulting your doctor.
UK Cystic Fibrosis Trust - lots of patient information available online
CFStudy.com - my own web site, with a great deal of information and articles about CF
CF Medicine.com - a lot of articles, some freely available to the public, full access requires registration
My Cystic Fibrosis.com - some useful articles, but registration is required. You can login as a guest.
Cochrane CF and genetic disorders group - evidence based information about CF
CF Worldwide - association for people with CF and their families
European CF Society - organisation for health professionals involved in CF in Europe