I revised the post to correct the path name to
www.particleandfibretoxicology.com/content/10/1/47
That seems to work.
My main point was not to try an nail down precise toxicity issues as I will not have the actual data and case conditions to know how to evaluate, but rather to note that nothing jumped out at me as looking like a show stopper problem up ahead.
I did find it interesting though and might give someone an idea of what is being looked for. for example I noted some increased levels in reactive oxygen species, and the blood counts showed increased granulocytes, possibly a reaction to some stress or inflammation indication?
Again though, I am not sure of the comparability to the NNVC product.