None of our CIDP patients reacted against any of the other candidate antigens (MPZ, NrCAM, contactin-2 (CNTN2)/contactin-associated protein 2 (CASPR2) complex, gliomedin and voltage-gated sodium channel subunits B1 (NavB1) and B2 (NavB2)). Here, CNTNAP2 is linked to chronic inflammatory demyelinating polyradiculoneuropathy.