First thing I would say, I wouldn't look at it as a negative. We actually look at it as a positive that we think it's important that we get multiple pathways into the market utilizing our antibody peers or it will never be the standard. It will actually get reinvented and could dismiss a lot of the long term value creation opportunity. So a lot of what we're doing is proactively establishing a long-term value for this Nf-L franchise. And so the one place so far that we have licensed and we've only licensed that for the purposes of a long-term IVD diagnostic is to Siemens. Siemens has an installed base of 10,000 - 7,000 to 10,000 instruments and we believe there are some use cases that you'll be able to deploy, in an IVD setting, inside of their instruments that we think it bodes well for us to work with them to get the Nf-L and an IVD basically franchised. And so they will be making investments, significant investments over the next several years to get our Nf-L as an IVD on their platform. Now that is a non-exclusive, meaning, that we can in fact, move that on to other diagnostic platforms and we do think that Roche and Abbott, both are very significant installed basis. All of these companies Roche, Siemens, and Abbott do primarily singleplex, they don't do multiplex. We think longer term, that for a drug - for disease specificity, having a panel is going to be important because Nf-L only shows neurodegeneration. So it's kind of like the cholesterol of the brain, that could be a lot of different things that cause cholesterol to go up. And so there's a lot of pathology that different drugs go after. We now have drugs going after Nf-L, believe it or not, as a target. And so, our view is if that, longer term, when there is interest for specificity, is it Alzheimer’s that’s created the neuronal disease or is it MS, or is ALS, or is it concussions? We think the specificity is going to require other markers to be added to the panel, and that’s something that unfortunately, many of our IVD partners - we have two right now, we have Siemens for Nf-L and we have Abbott for blood screening but not with the Nf-L but just in the general category. They would not necessarily be able to utilize it in a multiplex because they don't do multiplex and if they did they would not have sufficient sensitivity for those use cases. And so in a way we think we're building a very bold market for Nf-L and for Samoa given that we think longer term a multiplex is going to be very much needed to get sufficient neuro disease specificity.