The incident had made her leery when Theranos sent her a lab report for another one of her patients showing an abnormally high TSH value. The patient was already on thyroid medication and the result suggested that her dose needed to be raised. Before she did anything, Dr. Stewart sent the patient to get retested at Sonora Quest, a joint venture of Quest and the hospital system Banner Health. The Sonora Quest result came back normal. Had she trusted the Theranos result and increased the patient’s medication dosage, the outcome could have been disastrous, Dr. Stewart said. The patient was
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