My Husband Was In The US Army From The Age

My husband was in the US Army from the age of 17 to the mid 40's. He did a number of jobs throughout the years, five of them exposing him to asbestos. His x-rays show biapical plural capping. CT scan found three nodules, 2 which are 4mm and 1 at 5mm. His PFTs revealed he has restrictive breathing. The VA says that he does not need a pulmonary referral and that none of his problems are related to his service career. Yes, he has smoked for forty years.
any advise will be greatly appreciated,

Thank you,
Melanie Curtis