In investigation report of patient with Sjogren's syndrome which of the following is NOT true

Name: In investigation report of patient with Sjogren's syndrome which of the following is NOT true
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Rheumatoid factor is often positive in patients with Sjögren's syndrome, not negative. Sjögren's syndrome is an autoimmune disorder, and the presence of rheumatoid factor, along with anti-SSA (Ro) and anti-SSB (La) antibodies, and antinuclear antibodies, are common findings that support the diagnosis.

In Investigation Report of Patient with Sjogren's Syndrome Which of the Following