Routine chest x-ray examinations.
D005188:False Negative Reactions; D005189:False Positive Reactions; D006801:Humans; D009381:Neoplasms, Radiation-Induced / Q000209:etiology; D011829:Radiation Dosage; D013902:Radiography, Thoracic / Q000009:adverse effects* / Q000706:statistics & numerical data; D012306:Risk