Farsalinos also questions what I was wondering with this: how hot - how much power - was the juice being subjected to? At a high voltage or wattage with a tank system, you're going to burn your juice. And what vaper enjoys burnt juice, anyway? I burned some juice early on while getting the hang of it, but have burned nary a microliter since, once I did get the hang of it. Inhaling burned juice is not vaping, it's simply sucking down burned juice, which nobody likes (Ok, I'm sure someone out there has a burned juice fetish, but that would be a private matter).
I've not read the study of course, but as a general principle, this gives another reason not to burn the juice, as if the foul taste wasn't reason enough. I think instances like these will also alert the PV manufacturers to fine-tune the devices. My EVOD has a 3.7v constant output rate, and there's no burning.
This is all still conjecture, and then there are issues is what the levels are at which voltage exactly, but one would think the principle would work. But what do I know? I could be wrong- I often am, as we all are (including scientists and [especially] politicians).
Also keep in mind that they were talking primarily about formaldehyde, which is but a single chemical; even in a worst case scenario, I'll trade a single chemical for dozens or hundreds or thousands of others. As a side note, acetaldehyde, which is also mentioned, is a toxin produced by the liver when metabolizing ethyl alcohol, which in large amounts apparently produces a hangover.