More Groups
Fewer Groups
More People
Fewer People
Vickers, A. J.; Rusch, V. W.; Malhotra, V. T.; Downey, R. J.; Cassileth, B. R. BMC Anesthesiology (2006)
Strong, V. E.; Dalal, K. M.; Malhotra, V. T.; Cubert, K. H.; Coit, D.; Fong, Y.; Allen, P. J. Journal of the American College of Surgeons (2006)