Than you both, En Bloc and Glenn. While unusual in the US, it's typical practice where I am, where the test is not done in the country, certainly not in the region, as a typical procedure. So the samples are sent to the US and since the state picks up the tab, you need approval. It's costly, so when approval is granted (just pro forma, they never decline), a single sample is sent. It's not ideal, I know, but it was all I could get here. I would have certainly preferred something more thorough, say though JHU. Perhaps I'll try to go through them next time, if my neuro agrees and the state grants permission.

It's interesting Corinthian Reference Lab is not as well known. I think they're affiliated with a top SFN clinic in Phoenix, but I'm not sure.