1. Division of Pulmonary and Critical Care Medicine and
2. Department of Molecular and Cellular Physiology, Albany Medical College, Albany, New York;
3. School of Computer Science and Mathematics, Marist College, Poughkeepsie, New York;
4. Department of Epidemiology and Biostatistics, Temple University, Philadelphia, Pennsylvania; and
5. Department of Neurological Surgery, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin