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I'm on holiday <a href=" http://www.aufildujeu.com/what-is-depakote-er-used-for ">depakote er half life</a> The accuracy of 23andMe’s DNA tests is central to FDA’s concerns. A false positive result could lead consumers to seek unnecessary and possibly harmful screening or treatment, regulators worry, while a false negative could allow a major risk to go unnoticed. FDA found tests predicting a person’s sensitivity to certain drugs, including the anticoagulant warfarin, to be “particularly concerning,” saying that people may change their dosage or discontinue a drug without professional advice. The letter scolds 23andMe for failing to provide evidence to the FDA that its tests work: “More than 5 years after you began marketing, you still had not completed some of the studies and had not even started other studies necessary to support a marketing submission for the PGS.”