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At first sight one may wonder why a paper published in the British Journal of Clinical Pharmacology is being highlighted on this web site.[1] Yet Dr Guiney and his colleagues have evolved a very elegant approach to complex metabolically relevant data collection using a simple, non-invasive test that should be celebrated as an example a combination of science, economics and human/animal care, sometimes assumed not to exist in large research establishments. This paper expanded on a previous study published in 2010.[2]