More Groups
Fewer Groups
More People
Fewer People
Ross, P. L.; Littenberg, B.; Fearn, P.; Scardino, P. T.; Karakiewicz, P. I.; Kattan, M. W. International Journal of Technology Assessment in Health Care (2003)
Groeger, J. S.; Weiser, M. A.; Lederberg, M. S.; Rubin, D. T.; Siegler, M. Cambridge Quarterly of Healthcare Ethics (2003)