[1] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Seoul, South Korea
[2] Hanyang Univ, Dept Med, Div Hematol Oncol, Seoul 133791, South Korea
[3] Hallym Univ, Chuncheon Sacred Heart Hosp, Dept Internal Med, Div Hematol Oncol, Chunchon, South Korea
[4] Parkside Phys Serv, Lake City, FL USA