1. Antibodies to Collagen in Patients with Idiopathic Pulmonary Fibrosis
George Nakos, M.D., Alex Adams, R.R.T., Nikos Andriopoulos, M.D. 
CHEST 
Volume 103, Issue 4, Pages (April 1993)
DOI: /chest
Copyright © 1993 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Correlation between duration (months) of the disease and the higher titer in each patient (–log2) of antibody activity against native collagen type I, II, III and IV (r = –0.84, p<0.001).
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3. Figure 2
Correlation between duration (months) of the disease and the higher titer in each patient (–log2) of antibody activity against collagen chains type α1 + α1(I), α1(II) and α1(III) (r = –0.75, p<0.01).
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Copyright © 1993 The American College of Chest Physicians Terms and Conditions

4. Figure 3
Correlation between duration (months) of the disease and the higher titer in each patient (–log2) of antibody activity against native or collagen chain type I (r = –0.57, p<0.05).
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Copyright © 1993 The American College of Chest Physicians Terms and Conditions

5. Figure 4
Correlation between duration (months) of the disease and the higher titer in each patient (–log2) of antibodies activity against native or collagen chain type III (r = –0.8, p<0.001).
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Copyright © 1993 The American College of Chest Physicians Terms and Conditions

6. Figure 5
Correlation between number of types of positive anticollagen antibodies in each patient and the median value (–log2) of antibodies activity (r = 0.91, p<0.01).
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Copyright © 1993 The American College of Chest Physicians Terms and Conditions

7. Figure 6
Correlation between duration (months) of the disease and factor of activity (factor of activity = median value of anticollagen antibodies titer • number of collagen types with positive anticollagen antibodies [r = –0.87, p<0.001]).
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Copyright © 1993 The American College of Chest Physicians Terms and Conditions

8. Figure 7
Titers of anticollagen antibodies in a representative sample of serum from patient with IPF. The sample was chromatographed on a Sephadex G-200 column.
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Copyright © 1993 The American College of Chest Physicians Terms and Conditions