Occupational asthma due to heated freon.
D001249:Asthma / Q000139:chemically induced*; D005617:Chlorofluorocarbons, Methane / Q000009:adverse effects*; D006358:Hot Temperature; D006801:Humans; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000139:chemically induced*; D014896:Welding
D005617:Chlorofluorocarbons, Methane