You do realize that the FDA (and almost every study coming across their desk) is directly funded by pharmaceutical companies, right? That many of these studies are cherry picked for ideal candidates producing the most desired outcomes, with those individual studies cherry picked as well? And also that medical science doesn't just exist inside the borders of the USA, but outside, where the beneficial and curative effects of lasers have been studied for decades?
Otherwise, you continue on the path of broken science, which only promises disease maintenance. There's no money in cures, such as stem cell therapy, and perhaps low level light therapy. Although the most corrupt organizations throughout history have always thrived under the most ill-informed and sickly populace.
Anyway, we're talking about harmless lasers under 10 milliwatts. The whole concept being that cold lasers increase ATP levels of cellular metabolism without the increase in damaging free radicals. Firstly, I cannot think of any device that could make such a bold claim, except perhaps (to a much lesser extent) LED infrared. This in turn increases the rate of mt/DNA and mt/RNA synthesis, which increases cell regeneration. These are some of the very same precepts under which synergistic mitochondrial cocktails have also been found to aid hair growth: ubiquione, carnitine, carnosine, SOD, niacin, biotin, vitamin C and D3 etc. There are already several studies showing that low level laser therapy significantly increased activity of cellular respiration complexes II and IV.
In fact, I'm starting to wonder whether hairloss is a byproduct of mitochondrial dysfunction. Without proper electron transfer in the inner mitochondrial membrane there is cellular dysfunction and death. Stem cells themself definitely cannot proliferate without properly functioning mitochondria. The Follica studies (or stem cells in general) and those of LLLT will likely make an eventual scientific convergence. I had also mentioned uridine in another post, which could help further along the respiratory chain.