Matthew P Cheng1,2,3, Caroline Quach4, Francisco M Marty1,2,3. 1. Division of Infectious Diseases, Brigham and Women's Hospital, Boston, Massachusetts. 2. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts. 3. Harvard Medical School, Boston, Massachusetts. 4. Department of Clinical Laboratory Medicine, Centre hospitalier universitaire Sainte-Justine, University of Montreal, Quebec, Canada.