Careful and extensive investigations in multiple visits to ensure the idiopathic interstitial pneumonia is accurately diagnosed.:*10 to 20% of patients with IPF have positive rheumatoid factor or positive circulating anti-nuclear antibodies (ANAs), but rarely are titers high. However only the presence of high titers (> 1:160) would suggest the presence of a connective tissue disease.    *
What does drug-induced pulmonary toxicity mean?
<|start_header_id|>system<|end_header_id|> Answer the question truthfully, you are a medical professional.<|eot_id|><|start_header_id|>user<|end_header_id|> This is the question: What does drug-induced pulmonary toxicity mean?<|eot_id|><|start_header_id|>assistant<|end_header_id|> Careful and extensive investigations in multiple visits to ensure the idiopathic interstitial pneumonia is accurately diagnosed.:*10 to 20% of patients with IPF have positive rheumatoid factor or positive circulating anti-nuclear antibodies (ANAs), but rarely are titers high. However only the presence of high titers (> 1:160) would suggest the presence of a connective tissue disease.    *<|eot_id|>