"obstructive respiratory diseases caused by chemical-irritant or toxic substances, which have forced the patient to refrain from all activities that were or may be the cause of the development, aggravation or resurgence of the disease".
"obstructive respiratory diseases caused by chemical-irritant or toxic substances, which have forced the patient to refrain from all activities that were or may be the cause of the development, aggravation or resurgence of the disease".