More Groups
Fewer Groups
More People
Fewer People
Jang, T. L.; Bekelman, J. E.; Liu, Y.; Bach, P. B.; Basch, E. M.; Elkin, E. B.; Zelefsky, M. J.; Scardino, P. T.; Begg, C. B.; Schrag, D. Archives of Internal Medicine (2010)
Elkin, E. B.; Bach, P. B. JAMA - Journal of the American Medical Association (2010)