 NEW YORK, April 29, 2021 GLOBE NEWSWIRE -- Daxor Corporation NYSE MKT: DXR, the global leader in blood volume measurement technology, today announces new data demonstrating the clinical utility of the BVA-100 blood test in postural tachycardia syndrome POTS published in the Journal of the American College of Cardiology from the Vanderbilt Autonomic Dysfunction Center in Nashville, TN. 