ok, so far from 'any doubt'.Actually, I as far as I can tell they don't have a 510k for prescription use of the airsonea. They have it for the wheezometer a.k.a sonosentry.
Week 46 Wrap: Copper hits 2mth low as Trump threatens net zero pace; US rally fades; HotCopper’s picks
AN1 CuFe sells its Crossroads gold royalty to Northern Star for $4M cash; says better than waiting for mine launch