[1] Washington Univ, Sch Med, Dept Radiat Oncol, St Louis, MO USA
[2] Washington Univ, Sch Med, St Louis, CO USA
[3] Washington Univ, St Louis, MO 63110 USA
[4] Washington Univ, Sch Med, Dept Surg, St Louis, MO 63110 USA
[5] Washington Univ, Sch Med, Dept Med, Div Hematol Oncol, St Louis, MO 63110 USA
[6] Mayo Clin, Dept Biomed Informat, Scottsdale, AZ USA
[7] Henry Ford Hlth Syst, Dept Radiat Oncol, Detroit, MI USA