[1] Univ Iowa, Dept Internal Med, Div Hematol Oncol & Blood & Marrow Transplantat, Iowa City, IA USA
[2] Univ Nebraska Med Ctr, Dept Biostat, Omaha, NE USA
[3] Rochester Gen Hosp, Dept Internal Med, Rochester, NY 14621 USA
[4] Pokhara Univ, Nobel Coll, Kathmandu, Nepal
[5] Univ Nebraska Med Ctr, Dept Internal Med, Div Oncol & Hematol, Omaha, NE USA
[6] Univ Nebraska Med Ctr, Fred & Pamela Buffett Canc Ctr, Omaha, NE USA