From the aDepartment of Laboratory Medicine, University of California, San Francisco, CA, USA; bSan Francisco General Hospital Medical Center, San Francisco, CA, USA; cWestat, Inc., Rockville, MD, USA; dBlood Centers of the Pacific, San Francisco, CA, USA; eBoston Biomedica, Inc., West Bridgewater, MA, USA; fAlpha Therapeutic Corporation, Los Angeles, CA, USA; gNational Genetics Institute, Los Angeles, CA, USA; hUniversity of British Columbia, Victoria, BC, Canada; and iBlood Systems, Inc., Scottsdale, AZ, USA.