More Groups
Fewer Groups
More People
Fewer People
Amar, D.; Rusch, V. W.; Bains, M. S.; Ginsburg, I.; Leung, D. H. Y.; Zhang, H.; Roistacher, N.; Downey, R. J.; Ginsberg, R. J. Anesthesia and Analgesia (1999)
Weinstock, D. M.; Rogers, M.; Lim, S.; Eagan, J.; Sepkowitz, K. A. Infection Control and Hospital Epidemiology (1999)