To an extent I can understand why you would have different ranges in different countries but why do the ranges differ from lab to lab here in the UK? They're not using different units are they? For example for tpo ab....I have seen 0-34 as a very common one but the place where my bloods were tested the range was 0-100. So my first result of 92 was negative with my lab but had it been done at a 0-34 one it would have been strongly positive. Am I just being thick???