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