1. Department of Emergency Medicine; Division of Emergency Medicine Research; Mayo Clinic; Rochester MN
2. The Knowledge and Evaluation Research Unit; Mayo Clinic; Rochester MN
3. The Department of Internal Medicine; Division of Preventive Medicine; Mayo Clinic; Rochester MN
4. The Mayo Medical Libraries; Mayo Clinic College of Medicine; Rochester MN
5. The Department of Emergency Medicine; Hospital of the University of Pennsylvania; Philadelphia PA
6. The Department of Internal Medicine; Division of Endocrinology and Metabolism; Mayo Clinic; Rochester MN
7. The Department of Emergency Medicine and Department of Epidemiology and Community Medicine; University of Ottawa; Ottawa Ontario Canada