| Affiliation: | JAMA, Chicago, Ill (Drs Olson, Rennie, and Cook, Mss Flanagin and Reiling, and Mr Pace); Department of Medicine, Division of Emergency Medicine, University of Washington, Seattle (Dr Olson); Institute for Health Policy Studies, University of California, San Francisco (Dr Rennie); Departments of Medicine, Clinical Epidemiology, and Biostatistics, McMaster University, Hamilton, Ontario (Dr Cook); and Department of Community Health (Drs Dickersin and Hogan and Ms Zhu) and Center for Statistical Sciences (Dr Hogan), Brown University, Providence, RI. |
