Ankylosing Spondylitis

[kali]

My husband is a bone marrow transplant recipient from an unrelated donor 4 years ago. He is a former smoker.

He has mild COPD.
He has chest wall thickening from ankylosing spondylitis.
He has scoliosos that is preventing his rib cage from allowing his lungs to expand.
He has interstitial scarring from radiation therapy.
He has lost a lot of weight (20 lbs) in the last 6 months.
He is having problems breathing and can not really cough.

He recently saw a pulmonary doctor who prescribed him nebulizer treatments which have not really helped.

I am wondering though what kind of specialist would be best for these various issues which are all contributing to his inability to breath.

I am losing hope.