Emphysema and PFTs.
D004646:Emphysema / Q000175:diagnosis*; D005568:Forms and Records Control; D006801:Humans; D007344:Insurance Claim Reporting / Q000145:classification*; D007349:Insurance, Health, Reimbursement; D012129:Respiratory Function Tests / Q000145:classification* / Q000191:economics*; D014481:United States