You need a subscription to read the whole article. I read it on my cell phone and now I can't find it again. Note that Evenflo is mentioned. They are a car seat manufacturer located in Pensylvania. SB was in Pensylvania a little while ago working on the 6th leg.

https://www.wsj.com/articles/check-the-back-s...&pos=1

http://www.evenflo.com/