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Discussion Starter · #1 ·
A 34-year-old man develops pulmonary hemorrhage and glomerulonephritis. Lung biopsy with immunofluorescence demonstrates IgG deposition along the basement membrane. These antibodies are most likely directed against which of the following types of collagen?

A. Type I
B. Type II
C. Type III
D. Type IV
E. Type X
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