Table 3.

Autoimmune panel

Parameters	Observed values	Reference range
C3	119 mg/dL	88–206 mg/dL
C4	26.5 mg/dL	13–75 mg/dL
Angiotensin-converting enzyme levela	36 U/L	8–53 U/L
Anti-double stranded DNA	negative	<30.0 IU/mL
Rheumatoid factor level	negative	<20.0 U
Perinuclear antineutrophil cytoplasmic antibodies	<1.2 titer	-
Cytoplasmic antineutrophil cytoplasmic antibodies	<1.2 titer	-
Anti-Sjögren's syndrome-related antigen A level	<0.20 U	<1.0 U
Anti-Sjögren's syndrome-related antigen B level	<0.20 U	<1.0 U

^aAngiotensin-converting enzyme gene polymorphism.