CNTNAP1 and chronic inflammatory demyelinating polyradiculoneuropathy: In chronic inflammatory demyelinating polyradiculoneuropathies, nodes of Ranvier were elongated and paranodes identified by Caspr and neurofascin immunoreactivity were dispersed (Doppler et al., 2013) whereas Caspr staining was fainter in patients with Guillain–Barré syndrome (Ruts et al., 2012).