If there an up-to-date reference format for frontiers in neurology

If there is an up-to-date reference format for Frontiers in Neurology, I found a 2017 edition, but it's not the same as the journal requested. When there are more than 6 authors, it does not use "et al." The first image is what I want it look like, the second image is what I set it to look like, how do I change it to the first image.
https://s3.amazonaws.com/zotero.org/images/forums/u11571691/cp7bfsmx6apqb3nowvoo.png
https://s3.amazonaws.com/zotero.org/images/forums/u11571691/8xbmvv59qo8z1w7841lh.png
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