SLE

Polymyositis

Rheumatoid arthritis

Scleroderma

Sjögren's Syndrome

Vasculitis

Drug induced

Hepatic diseases

Alcoholic liver disease

Chronic active hepatitis

Primary bilary Cirrhosis

Pulmonary diseases

Asbestos-induced fibrosis

Idiopathic pulmonary fibrosis

Primary pulmonary hypertension

Infections

Acute Viral

Chronic

Malignancies

Leukemia

Lymphoma

Melanoma

Solid tumors (breast, kidney, lung, ovary)

Hematological disorders

Autoimmune hemolytic anemia

Idiopathic thrombocytopenic purpura

Miscellaneous

Endocrine disorders (type I diabetes mellitus, Graves' disease)

End-stage renal failure

Multiple sclerosis

Organ transplantation

Healthy persons

Normal old aged individuals (females more than males)

Pregnant females

Relatives of patients with rheumatoid diseases