That is a fair point, or two. My frustration with studies of this type is that they provide very little guidance with respect to how to prevent a condition, how

That is a fair point, or two. My frustration with studies of this type is that they provide very little guidance with respect to how to prevent a condition, how to fix a condition, or how to manage a condition. Nor, do they give me much hope that even a long way down the road will they do so. My focus, because of a family situation, is management. Whether there's one type, four types, or more than a thousand types is, to me, immaterial. Even if this study was a complete genetic explanation of the mechanism, it wouldn't help, because I don't work with genes, I work with gene expressions, manifestations and symptoms.