1 Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA. Electronic address: jacobs.jeremy@mayo.edu.
2 Division of Transfusion Medicine, Department of Pathology, Microbiology & Immunology, Vanderbilt University Medical Center, Nashville, TN, USA.
3 Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, MA, USA; Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Charlestown, MA, USA; Department of Physical Medicine and Rehabilitation, Brigham and Women's Hospital, Boston, MA, USA; Department of Physical Medicine and Rehabilitation, Massachusetts General Hospital, Boston, MA, USA.