MFN2 and hereditary sensory and autonomic neuropathy: The International study on MFN2 mentioned above included 323 unrelated probands, of whom 249 (77%) probands were diagnosed as CMT2, 20 (6%) had intermediate CMT, six (2%) had CMT1, three (1%) had dHMN and one (<1%) had hereditary sensory and autonomic neuropathy (HSAN, while 44 (14%) had an unknown neurophysiological phenotype.