1. Department of Laboratory Medicine, University of Washington, Seattle, WA
2. Department of Pathology, University of Utah, Salt Lake City, UT
3. Capitol Hill Medical, Seattle, WA
4. Department of Family Medicine, University of Iowa Hospitals and Clinics, Iowa City, IA
5. Seattle Children’s Hospital, Seattle, WA
6. The Permanente Medical Group Regional Laboratories, Richmond, CA
7. Department of Pathology, University of Iowa Hospitals and Clinics, Iowa City, IA
8. Department of Internal Medicine, University of Iowa Hospitals and Clinics, Iowa City, IA