Article History
Received: 26 March 2021
Accepted: 13 October 2021
First Online: 29 October 2021
Change Date: 24 December 2021
Change Type: Update
Change Details: Supplementary file has been included to the article.
Declarations
:
: The authors declare that they have no conflict of interest.
: The EEG data used as examples for spectral analyses in this review were obtained from an anesthetized patient under ethical approval (No. ERB-C-1074-2) by the Institutional Review Board for Human Experiments at the Kyoto Prefectural University of Medicine (IRB of KPUM).
: For this non-interventional and noninvasive retrospective observational study, informed patient consent was waived by the IRB of KPUM; patients were provided with an opt-out option, of which they were notified in the preoperative anesthesia clinic.
: The EEG data used as an example for the data analysis in this review were approved and the requirement for written informed consent was waived by the institutional review board of KPUM.