IgA.CSF/IgA.serum &#x7C; Serum and CSF &#x7C; Chemistry - non-challenge
iga.csf/iga.serum &#x7c; serum and csf &#x7c; chemistry - non-challenge
IgA.CSF/IgA.serum &#x7C; Serum and CSF &#x7C; Chemistry - non-challenge
iga.csf/iga.serum &#x7c; serum and csf &#x7c; chemistry - non-challenge