Vitamin D Supplementation Is Associated With Stabilization of Cardiac Autonomic Tone in IgA Nephropathy. Issue 2 (August 2015) - Mann, Michelle C.; Hemmelgarn, Brenda R.; Exner, Derek V.; Hanley, David A.; Turin, Tanvir C.; Wheeler, David C.; Sola, Darlene Y.; Ellis, Linda; Ahmed, Sofia B.