1. Department of Medicine, University of Colorado Health Sciences Center, Denver, Colorado
2. Department of Pathology, University of Colorado Health Sciences Center, Denver, Colorado
3. Department of Neurosurgery, University of Colorado Health Sciences Center, Denver, Colorado
4. Durango Medical Clinic, Durango, Colorado
5. Department of Biochemistry, Biophysics, and Genetics (AG-H), University of Colorado Health Sciences Center, Denver, Colorado