Impact of preoperative versus postoperative dialysis on left ventricular assist device outcomes: An analysis from the Society of Thoracic Surgeons Interagency Registry for Mechanic... oleh J. Hunter Mehaffey, MD, MSc, Ryan Cantor, PhD, Susan Myers, MS, Nicholas R. Teman, MD, John A. Kern, MD, Gorav Ailawadi, MD, Francis Pagani, MD, James Kirklin, MD, Kenan Yount, MD, MBA, Leora Yarboro, MD