A new alarm point of transcranial electrical stimulation motor evoked potentials for intraoperative spinal cord monitoring: a prospective multicenter study from the Spinal Cord Monitoring Working Group of the Japanese Society for Spine Surgery and Related ResearchSho Kobayashi, Toshikazu Tani, Masahito Takahashi et al.|Journal of Neurosurgery Spine|2013Cited by 144