interstitial lung pneumonitis disease history evidence active infectious pulmonary ild 
pneumonitis organizing fibrosis idiopathic pneumonia induced pulmonary history chest obliterans 
pneumonitis infectious non history steroids required current evidence active known 
composition compounds chemical similar attributed allergic reactions biologic history used 
oxygen air room pulse oximetry saturation supplemental rest dyspnea pulmonary 
severe infection immunodeficiency disease moderate pneumonia bacteremia hospitalization impairment complications