I should've been more specific. I'm aware of the study and have seen it, but to my knowledge they refused to publish data regarding the manufacturers, probably

I should've been more specific. I'm aware of the study and have seen it, but to my knowledge they refused to publish data regarding the manufacturers, probably for legal reasons. It's curious that other replies garnered from my post the implied information that I was relating to a lack of specific/specified manufacturers, and you're the only one who took it completely literal. :)