1. Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, Pennsylvania.
2. Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania.
3. Department of Biostatistics, University of Pittsburgh, Pittsburgh, Pennsylvania.
4. Department of Emergency Medicine, Emory University, Atlanta, Georgia.
5. Department of Reproductive Endocrinology, University of Utah, Salt Lake City, Utah.
6. School of Nursing, University of Pittsburgh, Pittsburgh, Pennsylvania.
7. Center for Neuroscience, University of Pittsburgh, Pittsburgh, Pennsylvania.
8. Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, Pennsylvania.