All
 C21 Disorders of Environmental Origin D007280 +
 C21.447 Occupational Diseases D009784 +
 C21.447.080 Agricultural Workers' Diseases D000382 +
 C21.447.125 Bird Fancier's Lung D001716 
 C21.447.410 High Pressure Neurological Syndrome D006610 
 C21.447.426 Inert Gas Narcosis D007222 
 C21.447.506 Laboratory Infection D007757 
 C21.447.270 Dermatitis, Occupational D009783 
 C21.447.800 Pneumoconiosis D011009 +
 C21.447.653 Persian Gulf Syndrome D018923 
 C21.447.900 Sleep Disorders, Circadian Rhythm D020178