This reminded me of the Swedish study that noticed a correlation (they were very clear about this!) between vinyl flooring and autism in their data:

http://www.scientificamerican.com/article/link-between-autis...

That was way back in 2009, and I never heard anything more about it. Searching for information in later years yields an echo chamber of stupidity, so I wonder if anyone else has heard of actual research into the topic?