1. Department of Pharmacy, University of Washington, Seattle, Washington, USA.
2. Department of Laboratory Medicine, University of Washington, Seattle, Washington, USA.
3. Capitol Hill Medical, Seattle, Washington, USA.
4. Department of Laboratories, Seattle Children's Hospital, Seattle, Washington, USA.
5. The Permanente Medical Group Regional Laboratories, Berkeley, California, USA.
6. Department of Pathology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA.