CNTN1 and chronic inflammatory demyelinating polyradiculoneuropathy: Accumulating evidence indicates that some patients with CIDP harbor autoantibodies against nodal or paranodal proteins, such as neurofascin 186 (NF186), neurofascin 155 (NF155), contactin 1 (CNTN1), and contactin‐associated protein 1.13, 14, 15, 16