More Groups
Fewer Groups
More People
Fewer People
Khokhar, S.; Vickers, A.; Moore, M. S.; Mironov, S.; Stover, D. E.; Feinstein, M. B. Thorax (2006)
Vickers, A. J.; Feinstein, M. B.; Deng, G. E.; Cassileth, B. R. BMC Palliative Care (2005)