https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5177671/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4834991/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5081109/
http://nnjournal.net/article/showpdf/1324/1037
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4959779/
https://www.ncbi.nlm.nih.gov/pubmed/27643908
http://www.pedneur.com/article/S0887-8994(15)30139-9/fulltext
https://www.sciencedirect.com/science/article/pii/B9780444634320000177?via%3Dihub
https://www.sciencedirect.com/science/article/pii/B978044463432000027X?via%3Dihub
https://link.springer.com/article/10.1007%2Fs00415-016-8277-y