There are 5 subtypes of<unk>  that are differentiated according to the duration of exposure, development of symptoms, pulmonary function, and findings on chest imaging.<unk>  is classified as either simple chronic, complicated chronic, interstitial pulmonary fibrosis, accelerated<unk> , or acute<unk> .
Silicosis classification
Empyema classification
Pneumoconiosis classification
Atelectasis classification
Rhinitis classification
Tuberculosis classification
Pharyngitis classification
Esophagitis classification